I've been struggling with rebuild of the original 351 Palmer engines and have come into a Covid 19 essential worker bonus that has me considering new rebuilds. In the interim I had purchased what I thought were a pair of good 302's as a temporary fix to get me out cruising, however I was misled and taken for a different kind of ride. My question for the group is should I go with 302 long blocks or stay with the 351's? I know displacement is king, but all the ancillary parts on the 351's are original and look like failure may be imminent in the not so distant future. The 302's on the other had have a lot of replaced, upgraded ancillary pieces and I feel are in much better shape than the others. Manifolds and risers are a given on either choice. Lastly, I could go to short blocks rather than long blocks and consider the use of my early 351 heads (reconditioned of course) to get the larger valves and combustion area with the necessary turned head bolts. Thoughts either way would be greatly appreciated.