Ok ther is this girl on cardomain with an 03 auto mach 1, and she wants to freekin put 6.17 gears in it.It will eventually have a cobra motor motor in it, and she wants it to be all race and not driven on the street, I think that is WAYYYYY to much gear but she keeps saying that her dad has like 30 years of racing or whatever and that he knows what he is doing.What do you guys think?Low gear would BASICALLY not even be usable LOL even with the high rev capabilitys of the cobra engine(6800?) My 66 rev limits at 7500RPM and man even with 3.80 gears it come up FAST, especially in low...I couldnt imagine 6.17s.