I only have 4 of 8 pistons installed and it's taking 35lbs to turn it over. No cam yet, just crank and 4 pistons. Before installing any pistons I'm able to spin the crank with very little effort. The 1st time I began installing the pistons it pretty much locked up after 2 pistons were installed. I removed them and started over and this is where I'm at so far. Something seems to be binding up the rods I'm guessing. 350 bored 30 over and rings are gapped at .019.