I'm building a 383 that will have approximately 350-400 hp and 380-430 ft lbs. It's going in a 1990 4wd 1/2 ton chevy with a manual 5 speed. I'm not going to be racing this truck or playing in it (much). Will the increase in torque from the 4.3 the the 383 eat my drivetrain for lunch? I'll probably add a drive line from a 3/4 ton. I'm mainly worried about the tranny. But if it does die, are there any heavy duty rebuild kits for the gm 5 speed overdrive manual transmission?