Glenn, if it was me I'd do a cylinder leak down before I tear it all apart. One time we had a problem with the torque converter pushing on the crank, because the adapter for the Hemi got in wrong, so we ended up wearing the main bearing thrust out.
The only time we have a problem turning the motor over is when we install the rockers with the firing order, just too unbalanced with just some of the valve springs installed. Once all the springs are active, no problem.
The one odd deal we had was after installing block filler in a new/old Hemi block, and then letting it set for a few weeks so we could have it all machined. We then sent it to Gene Adams [ mister Early Hemi] , he said " they these bores are not round" I said " how can anyone bore square holes" anyway Gene had it rehoned with his guy. when we raced it at the 2016 March Meet, it was 1 1/2 to 2 tenths slower with the very same combo/ tune up we had last. After the second race we had low cylinder leak down in a couple of holes. At home we pulled the heads and found 2 pistons were scuffed in the wrist pin areas, not on the skirts.
Ya even Gene said he'd never seen anything like that. We had a couple of spare pistons, so I took the block back to our machine shop to hone the alum out. But they told us we better have a look at the block, the bores were not round again. They told us they ran into something like that a couple of months ago, with a race engine customer that had also installed block filler, but before the engine was put together , he changed his mind and wanted to run bigger pistons. He asked if they could install bigger sleeves to run biger pistons [ alum block]. As it turned out after putting the block in an over to get the old sleeves out, they could not remove the sleeves after using block filler. The shop told him they could just bore it another .30 with the sleeves he had. When they measured the bore they also found they were not round. after putting the block in the oven 3 times, it stopped changing size. The thought of course was the block filler was still expanding, at least when it got hot, like when we raced the Hemi. Yes the Hemi turned over hard, with the scuffed pistons. What I did is have QMP Race put the Hemi block in the oven until it also stopped changing, so I could order the right size pistons.
Well , "that's racing "
Jon