Thanks for the info. I wish I had logged back on before I pulled the trigger on Speed Hut. The gauges arrived well packed and looked great. I opted for the aluminum backing and purely subjective. I had lost the fuel gauge ( at zero always ) as mentioned and when the speedometer stuck...started my search.
Took my car to a long term Ford dealer to install the new set. The vacuum gauge would not calibrate to zero. Speed Hut sent a replacement after getting somewhat nasty with the tech. Of course, this was after 2.5 hours of attempts to zero the boost gauge and more $$$. New gauge calibrated. Final install shows the speedometer out of vertical by several degrees as well as the oil pressure gauge. The SH reply, “the technician installs the gauges on a bench and you can easily back off the retaining nut and adjust”. Really? Easily? After they’ve been installed? Then, as posted here ( yeah, I didn’t search and only posted, like an idiot ) the speedometer definitely jumps in the area between zero and 15 MPH. The Ford tech also noted the amp meter showed charging incorrect by 2.7 volts.
As another poster said, for ten cents on a buck, it’s less painful but you get what you pay for. Three emails to SH have been met with excuses and/avoiding my questions until I pressed harder.
Last but the most aggravating, they don’t care if their gauge fails. They replace it but the additional time, labor and exposure of your GT is all on you. No apology, no offer to assist in expense. I suppose now I should check for the correct 18V converter vs 12. No one to blame but my lack of research.
All said and done, I now know I have gas and can take down the RPM VS MPH card another GT owner helped me with, to gauge my speed.
Cheers and thx again for the feedback