It’s a stock block with billet mains and lifter bushings.
If I had a do over I would for sure find an aftermarket block for this type of power.


1971 Plum Crazy Super Bee. 572 World Aluminum block with a Cope 727 & Dana 4.10 out back. 9.88 @ 138 with a 1.35 60 NA. Dialed back to 10.0’s. 4000 lbs with me in it.