i've aquired an 82 6.2. i don't know the milage on the motor. i pulled the oil pan, there is no sludge in the bottom end and there is still cross hatch in the cylinders. what else should i look for to determine if it needs rebuilding before i swap it in my truck? i'm running a 350/465 now. can i use the same flywheel and clutch with the 6.2?