To recap: Use the whole rotating assembly AND the Magnum heads on the LA block, this will give the best results.
As you're swapping a neutral balance 5.2 assembly for a neutral balance 318 assembly you don't have to do anything babout torque converter or flywheel balance. ALL 3.91 x 3.31 V8 engines are neutral balance.
OR, you could spend $100 and have the 5.2 block sleeved and finished to your existing piston size. Then it would be all 5.2 and you'd have the roller cam to boot.
