You need to check the runout on the crank to see if its bent or the journals are out of round. Something is making the crank feel tight. You also need to check the bearing clearnaces at the parting line also, and even the housing bores. Anything less than .002" on the rods and mains is too tight for this high an output engine, .0025" would even be better but all the journals need to be round within a tenth or so and not tapered. Your bearing clearance is measured from the largest size that the crank mics, not the smallest.
