I just bought a 1971 318 Challenger that was originally orange that I want to do an engine swap on. I'm just not sure what direction to go I have most of the top end for a six pack for a 440 just missing the block which is no problem to find. I'm just not sure to build a 440 six pack for it, or a new style 5.7 or 6.2 HEMI for it. what's everyone's opinion ?