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Mike Pearson · 02-01-2024, 08:28 PM

If it’s a one piece seal they still have a plate. The two piece adapter bolts to the same flange and has the groove for the two piece seal. That way you can run a 2 piece crankshaft or the one piece crank in those blocks. I have one bow tie block that is for a two piece seal only and it does not have a plate. It has a standard rear main cap. You can only use a two piece seal crank in that block.

02-01-2024, 08:28 PM	#2
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,452 Likes: 615 Liked 1,937 Times in 582 Posts	Re: GM sportsman Bow Tie sbc block question If it’s a one piece seal they still have a plate. The two piece adapter bolts to the same flange and has the groove for the two piece seal. That way you can run a 2 piece crankshaft or the one piece crank in those blocks. I have one bow tie block that is for a two piece seal only and it does not have a plate. It has a standard rear main cap. You can only use a two piece seal crank in that block. __________________ Mike Pearson 2485 SS Last edited by Mike Pearson; 02-01-2024 at 08:38 PM.