[dynoroom]

1st check that you have crank thurst, sounds like you checked everything you should have "in" the motor, so is the flywheel on? Sometimes the bolts are too long and go through the crank and hit the rear main cap, look at that. Do you have rod side clearance? If it a Cleavlor does that mean you have an aluminum block? How did you check your bearing clearance, plasti-gauge, dial bore gauge or?