[Dan Lancaster]

Install one intake valve and one exhaust valve in the head with close pins holding the valves in the head. Use a couple of bolts and put this assembly on the block with out pistons installed in the block. Flip the block upside down on your engine stand and push the valves towards the block by hand. This will let you know if there will be any interference and show how badly the valves will be shrouded by the block. If you decide to cut the block, be sure you don't take off so much material that the stock head gasket won't work or you will be o-ringing the block or installing copper head gaskets.