Thanks for the info about align boring the block. Makes sense now.
What is the 2.4380"-2.4390" dimension? If I remember correctly the 287/288 and 316/317 crank journals are around 2.5", so "O.D." of the bearing inserts would be around 2.5" + twice the thickness of the shell.
Yes, Mike Vaughans is the guy looking for the information.
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My Pontiac is a '57 GMC with its original 347" Pontiac V8 and dual-range Hydra-Matic.
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