Me and one of my best buddies are turbo ls swapping his 76 c10. Combo will be a sbe 5.3, vsracing billet 7875, 4l80e with an hd2. He currently has a factory 12 bolt rear thats been recently rebuilt and had 3.73s installed. will be ran on a messily 5lbs or so until he gets used to power(going to be both of ours first 400+ whp vehcile), and then tuned up to a max of around 15 or so hoping to make around 600 to the tire. Hows the 3.73s going to act? will be a strict street truck and maybe see the local track a couple times a year.