501 ,
I have a HAPPY 350 Crate in mine ...she runs just fine but like Longbox said watch her especially on the wet roads !..lol
even with a posi mine will get all over an make ya suck a nice portion of the seat up your Anal Orifice if ya not payin attention !
As I finish puttin mine back together I am movin as much weight to the rear as I possibly can to try an settle it down.
Good Luck !
I recomend the Crate motor for the simple fact it is already done an comes with a warrenty.
just my 2 pennies.
Tim
