Well, I did it. Inna moment of weakness, I bought another car - a '55 Chrysler (pix attached). The good news is it's a reasonably solid low miler; the bad news is it's a poly head 301. About 15 years ago, I had a '56 poly head Chrysler with the Power Package - dual point distrib, 4 barrel manifold, dual exhaust - and the big beastie ran out rather well. I'd like to hop up the motor a tad (along with some other things) and had a couple of questions: 1) can the similar vintage hemi manifolds be adapted to fit the poly? 2) ditto for headers - if the bolt pattern (2 center bolts on the poly vs 1 on the hemi) is modified - can the hemi headers be used? I know pretty much everything below the deck line is the same, so 331 hemi cams will work - got any suggestions on who is a good source for a hotter cam?