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I got my block back from the machine shop with new Pistons and rings, I dropped the crank in installed the rings, dropped the Pistons in, put the caps on. With everything loose it's hard to turn the crank. When I put 20 ft.lb. on the caps I can't turn it at all. Before I took the block to the shop I re ringed the original Pistons and turned the crank just fine the box for the Pistons says it's over .040 and that's what the shop did to the block. Any ideas?

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As above, lube, plastigage. You will need the .003, smallest. Also, did you have the piston on too? I'd do the crank and see if it turns. Also, I believe you should torque the center cap first then rotate outwards. Check the FMS. Then add the pistons and rods into the equation. I'd also swipe the bores with a light coat of oil. I clean the bores first with ATF. 

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