As the stock crank in the 502 crate engine package is a balanced, forged piece, it's retained for the race engine. But, it was rebalanced after the engine's new pistons and rods were fitted to it. The existing external balance holes were simply drilled farther-McLaren took 105 grams from the front of the crank and 115 grams from the rear. Once rebalanced, the crank was micro-polished before being dropped in the block. Installed, crank endplay measured .005 inch, which is close to a street engine's specs. If the engine were to be used in a manual-transmission car, more clearance, from .007-.010-inch, would be acceptable, as the rear of the crank would typically endure more heat expansion.