I dont know guys, but he was talking mustangs.. My friend is running a 3.55 in his Twin Turbo 351W 95 Mustang.. And he is about to go lower than a 3.55.. So to say its a weinie gear is pretty harsh.. Real Fast cars dont need tall gears to go fast would be a better statement. hense the reason i have 4.10's in my Mark.. Because its not that fast.
Might be a waste for a guy with an LSC to go to a 3.55. and its not as hard as everyone says. i did mine on a bench, with jack stands and a floor jack. took me a day but its not that hard.. If you plan on doing HUGE mods and making real power, then dont go with too big of a gear, unless you want to run a hella tall tire. Just my .02