A buddy of mine has a full bolt on & cammed 01 Bullitt with 4.10 gears. Since he likes doing alot of high speed runs (in mexico), I guess the 4.10's didn't have enough top end for him & he would run out of gear too quick. He asked me if I would be interested in swapping my stock 3.55 rear end from my Mach 1 with his 4.10 rear end. Since my car isn't a DD, & since 4V's love lower gears, I took him up on his offer without a 2nd thought.... We got the swap done last night & all I can say is OMFG!!!!! Why did I not do this a long time ago??? Man these things made my car rip & it never falls out of the power band. I also think that the around town drivability is even better & highway speeds aren't bad either. @ 75 mph, rpms were at around 2200, & @ 80 mph, rpms were at around 2600. Now I definitely believe in the statement "Don't fear the gear"... LOL...