Well, have my Forward 4 poster in place and it's the bomb. Problem is the stock ramps. The angle of approach is far too high coming into contact with the splitter. The Ford is factory height and when I use the Race Ramp calculation to determine angle of approach, it appears I need a ramp with less than 9.5 degree angle of approach. Race Ramps have several types ranging from 8 to 6.4 degrees angle of approach. Can anyone give me some idea of which ramp would work best?