Catch up on the Impossible GT Project


ImpossibleGT

GT Owner
Mark II Lifetime
Mar 21, 2019
60
Rochester Hills, Michigan
Hello all! Some of you may not remember me as I have not posted for a long time. I bought a body in white chassis from Ford almost 6 years ago with the intention of completely building a Ford GT widebody from the ground up. Some of you have asked what happened to the project and I'm sure many thought that I gave up. But the answer to that is NO! I think about this car every day and whatever parts I can't find, I make or source, so it has been taking a little longer than planned. I thought that many of you might be having the same challenges that I did on finding parts or alternate solutions, and I am happy to share what I can. At this point I have literally put every nut and bolt on the car and have become almost too intimate with this sexy beast.



So this is where it all starts.
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The Chassis was picked up in as a Ford part number in a crate from a Romulus warehouse. At the time, there were about 35-40 chassis left for sale. Today these are gone. The chassis is literally a body in white chassis with nothing attached to it, not even rivnuts for bolts to fasten to. When I bought this, I had no idea how hard it would be to find parts for this car. I had all of the body panels for the Ray Hoffman widebody version of the car and decided that I would go this way.
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This is the Ray Hoffman car and the exact body kit that I have for mine off of the same molds. I began collecting parts and in the meantime needed to address the wide body suspension that would be required. Each of the control arms would have to be 4” longer than stock. I partnered with some of the well known GT guys along the way and was able to design and fabricate my new suspension.

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The suspension turned out great! All of the control arms are custom designed to handle a variety of tire/wheel sizes and I had to develop bushings for all of these. I decided to design these for the stock control arms so that I could go either way if I changed my mind. Instead of rubber like the OEM used, I used high performance polyurethane and experimented with several durometers to get the feel right.

Of course when extending the control arms, the tie rods had to be lengthened as well as the half shafts. I designed a half shaft extension that sandwiches between the transmission and the half shaft and I had to use an aftermarket inner tie rod end that was a little longer. An Interesting fun fact is that the Tesla Model 3 outer tie rod mates perfectly to the stock GT steering knuckle and also has the proper thread for the inner tie rod. Who wudda thunk?
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I was able to find some parts but realized that a lot of the little detail parts were going to be hard to come by or very expensive to buy one at a time so I bought a wreck that was picked over, but had a lot of the parts that I needed – particularly the interior.
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This picture is a bit of a spoiler as this is where the car is today, but most of my interior came from the doner car. I have a lot of pictures of the car at each stage so if someone is looking for some detail, I can probably dig up a picture. There is also an order of operations when putting the car together and I can tell you that I probably put this car together twice, having to take it apart because of a step that I missed previously.

Along the way there were many parts that had to be reverse engineered because of availability or known failures. Here are some examples of what I had to make.
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Thermostat housing that houses the stock thermostat and o-rings. This is machined, while the stock housing is cast aluminum and known to be porous and leak with age.
 

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KennethClay

GT Owner
Mark IV Lifetime
Oct 15, 2012
894
New York
Amazing work! Would love to see photos from the whole process, either posted here or some sort of link.

What's the ETA for a finished car?

Kenneth
 

ImpossibleGT

GT Owner
Mark II Lifetime
Mar 21, 2019
60
Rochester Hills, Michigan
Continued...
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The taillights were not available at the time, so I learned to make a two part mold and cast my own lenses. I designed a Circuit board to drive the Lights and 3D printed the housings and reflectors. They plug into the stock harness and look great. Since, Ford re-sourced these and they are now available but at a hefty price.
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AC Lines. There are 4 lines that are no longer available. As usual I always make extras because there are other people out there like me who probably need them, but here they are. Another spoiler – that AC blows cold with no leaks!
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Fuel Filler parts. BUT, I hate this capless design as the movement would hang up, so I found that a McLaren MP4-12C Capless fuel filler neck works great with a mounting adaptor that I made. Much happier with this setup.
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Tube bundle Bushings. The center tube bundle was also not available and a pain to find. The wreck that I bought had some mangled tubes that a friend was able to repair for me, however the tube bundle bushings were destroyed. Since I already had my experience with molds and the taillights, this one was a piece of cake.
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Surge tanks. Had to design the buttress flange that the stock vent caps thread to and then incorporated that into a spun aluminum housing that was then painted to match the framework.
 
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ImpossibleGT

GT Owner
Mark II Lifetime
Mar 21, 2019
60
Rochester Hills, Michigan
Continued even more...
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A fully functioning Side view Mirror, since those are no longer available. I had to have the glass custom cut because of the unique shape of the GT Mirror. Made a few extra and have some extra mirror glass just in case!
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Hood hinges. Why you ask? It will cost you about $3000! I made extra sets of these too! This was a fun project. I started by making 3d printed prototypes to check fit and movement, then chose the proper bushings and worked with a company to orbital form the rivets. These worked out great.
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Gauges! Once I had power to the car, I discovered 3 or 4 gauges that either didn’t function or had stickey movement. I have these figured out now. All of them repaired and working well. The smaller gauges are still available from Autometer, but not in a catalog. You have to call and ask specifically. The Tach and Speedo are NOT available, so repair is the only option. I have a setup for sweeping the gauges to test them now. I tested some for a friend and found that his repaired Speedo was scaled wrong and always reads lower than true speed.
 
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ImpossibleGT

GT Owner
Mark II Lifetime
Mar 21, 2019
60
Rochester Hills, Michigan
And yet, even more continuation...
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Many 3D printed parts. Note that the door hinge parts and Accelerator pedal are printed in stainless steel, as I was trying out a new technology a the time.

And I mentioned before that I built the car twice over. I wasn’t kidding. Once I had the car running, It wasn’t running quite right and had a coolant/oil leak. Long story short I had to replace the head gasket, which involves pulling the engine and once it was back in the car, had to pull it out a second time because the timing chain was mismarked. It was actually a blessing though because the crank position wheel was also installed backwards, shifting the timing about 15 degrees. Had I not had to take the engine apart it would have been a bear to diagnose at a later date. I spent the whole summer messing with this issue. It runs great now though – no leaks and good compression.
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So by now I think you get the picture of where the last 6 years have gone. Now its time for the fun stuff! Today the car is a running, drivable chassis with working AC even. Yes of course there are some small things still needed here and there like a windshield and windshield wipers, but now is time for a color coat on the chassis and then the body.
 

ImpossibleGT

GT Owner
Mark II Lifetime
Mar 21, 2019
60
Rochester Hills, Michigan
and finally catching up to now...
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So here is where I am today. Next I am going to paint the hood, doors, and body, so that I can get glass and door seals on the car. After that I am at a fork in the road. I WANT TO FINISH THE CAR THIS YEAR. To do that, It will probably be a faster path with the stock body. That means that I would have to swap my wide body suspension with a stock suspension and obtain stock body panels. Big decision here! My goal is to be able to drive in the Woodward dream cruise with the rest of the GT clan in August this year. We will see. I promise that I will continue to post as things progress.

If any of you want to know more, see some more detailed pictures or use me as a resource when you are stuck, please do! I'm relentless when it comes to solving a problem.
 

ImpossibleGT

GT Owner
Mark II Lifetime
Mar 21, 2019
60
Rochester Hills, Michigan
Amazing work! Would love to see photos from the whole process, either posted here or some sort of link.

What's the ETA for a finished car?

Kenneth
Hi Kenneth,
I posted a little more. Sooo many little details. I tried to post the most interesting. Trying to drive it this summer one way or another!
 
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extrap

GT Owner
Mark II Lifetime
Jul 16, 2020
1,963
Gainesville FL
WOOOOOW! You are an inspirational mad man, who makes me feel like a pathetic loser! 🤣 Great work to date(!) and looking forward to following your progression ... To Woodward, and beyond!
 
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fjpikul

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Jan 4, 2006
11,758
Belleville, IL
Wow. Very impressive. I imagine Storm Cat is extremely jealous.

You sure do have some ugly co-workers there. Where do you find these deadbeats?

Just curious, why an old stock exhaust?
 
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DakotaGT

GT Owner
Mark II Lifetime
Dec 9, 2012
1,720
Sioux Falls, South Dakota
The most spectacular post I’ve seen in quite a while! Fantastic job, sir. You are a real credit to GT owners. Thank you for your amazing contributions to development of replacement parts that may benefit many of us for years to come.
 
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Kpgarage

GT Owner
Mar 17, 2019
101
We are clearly not worthy!
Well done
KO
 

KJD

GT Owner
Mark IV Lifetime
Dec 21, 2005
1,022
Location, Location
Sir, you are like a dog after a bone, relentless!

Extremely impressive effort and results, I'm (almost) speechless.

While I'm not a big wide-body fan, I'm surprised you're thinking stock body now unless your taste has truly changed.

Yes, the clock is ticking and the calendar is moving but unless you're exhausted or can't fit your kit, you've come this far, why punt now?

Also, same question as Dr. Frank, wondering about the heat sink muffler, so many better options.
 
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BtwoG

GT Owner
Dec 8, 2013
1,048
Atlanta, GA
Extremely impressive and well done. Cant wait to see the final product!
 

Tomcat

GT Owner
Amazing!!! To paraphrase others: I am not worthy!
 
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AJK

GT Owner
Mark II Lifetime
Jul 12, 2006
337
Can think of only one word. Genius.

AJK
 
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extrap

GT Owner
Mark II Lifetime
Jul 16, 2020
1,963
Gainesville FL
Woe, your avatar pic needs to be included here!
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roketman

GT Owner
Mark IV Lifetime
Oct 24, 2005
8,135
ma.
Congratulations on an absolutely epic project!
Please send more finished pictures!
 

MJSFRX

GT Owner
Mark II Lifetime
Jul 26, 2010
831
Carlsbad, CA
Amazingly Impressed. Good on you mate!
 
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AJB

GT
Mark II Lifetime
Le Mans 2010 Supporter
Jun 28, 2006
2,980
Bloomfield Hills, Michigan
Wow !
Andy (ajb)
 
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69b302

GT Owner
Mark II Lifetime
Mar 13, 2021
122
Upstate NY
Very impressive. Fabricated replacement parts look top notch.
 
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