i have 4.10's in mine, along with 31spline superiors, and 31 spline carrier (Ford) no problems so far, i love the 4.10's, if you're going to stay n/a though i'd go 4.30's it wasnt a big enough jump for me (i'm a 5spd btw)
doh, just saw the first post, 4.56's, you have some stones my friend
yea, i can only imagine, my street tires are 315 sumitomo's i blow them off till 3rd gear for the most part , friend took me for a ride in his 4.30'd mach when he has some bald toyo's, it was interesting to say the least :smmon: