505 stroker fresh off the dyno - Power seems low? Thoughs?

Along with above on cam degree. Most of the 440 blocks I’ve dealt with the deck height is more than factory spec, and usually not square front to back. I believe the 512 kit calls for .015” below deck for pistons. Also your lash may be tight. My 440 with eddy heads is .004” - .005” difference between hot and cold. The lash may not make much difference. But something to check. Just a couple of my thoughts.