Apologize up front, I'm not trying to hijack, but wanted to share. I'm doing a similar build; RA II SR heads(Jan 69 dated), but with an NOS Sept 67 dated SR 428 block. Using a Nodular .010/.010 turned 428 crank, the block came with fitted cast pistons, IIRC they CC'd at 14, have the 4 valve reliefs with the center circle taken out. Going with 1.5 Harland Sharp rockers. I want this to go in my 67, but still waiting on roundport adapter manifolds to fit the 67 A body. Using a nitrided voodoo 704 cam with NOS GM lifters. Pretty cool to find a 55 year old brand new 4 bolt main block, in the GM box with the red SR tag. Basically I'm making a 428 HO with RAII heads. Your build is going to be awesome, congrats and have some fun with it!
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Jason
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