[randy wilson]

Adger is probably correct. However, I have had blocks honed with studs, put together with bolts, and blocks honed with bolts, put together with studs, and not seen any leak down difference, or performance difference. That being said, he's always used the proper gasket, even torqued the oil pump down. And recommends you use the same fasteners he torques with. That being Al Parker. He has done a 283 block so well, it had zero leak down. I mean ZERO, all 8 holes. I do notice some stock blocks, not all, show the imprint of the studs, or bolts in the wall after tear down. On our last block done, a small bore bowtie, we looked at the computer graphs, and seen we had 20.39 inches of vac on a wet sump.