i found in my step dads massive collection of old original gm parts, some 5:13 gears. definately puttin them in the project truck. acceleration will be rediculous but itll prob top out at 85... anyone ever have anything with 5:13s and about 350hp goin to it? pros and cons

 

if you go with a 6 speed tranny maybe you'll get a top speed of 110?
i dont think anyone goes higher than 4:11's unless its strictly a drag car

 

They will be insane on the street and scary in the rain. My bro' used to run 5.13s and cheater slicks on his '57 two ten to play around on the street (back in the day). Even with no traction, he twisted off the splines of an axle. Nothing like axle replacement on a parking lot on a Sunday morning. Back then, you never went anywhere without a fully loaded toolbox in the trunk of your ride.

 

5.13 is steep.......Good for a dump truck

 

You might as well be talking 6:13 or 7:13 as far as im concerned with a street car. It might be fun to give them a try but i would never go above the 4:11's definately not on an A4.

 

Hopefully your "project truck" is a rock crawler.