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05-01-2024 08:20 AM #1
Block and Head Casting Numbers help
Hi All,
New member here.
My current project is a 1985 GMC 1/2 ton 2 WD. Super nice, rust free truck.
I've got 3 SBC engines in stock.
Block: 3970010
Heads: 397487
Appears to be a 350
Block: 3914660
Heads: 3947040
Appears to be a 327
Block: 3970010
Heads: 3932441
Also looks like a 350 pistons stamped .040 so its 40 over making it something like 357 CI
Any thoughts on which combination of these would be best for a mid range RPM daily driver would be very much appreciated.
Trans will be a 700R4
Rear ratio is 3.08
Thanks in advance.
RIP Johnboy !! he was a good bugger and certainly lived a hard and varied life and some of his battles with "authority" were legendary. i was lucky to receive his monthly diaries for years , which...
John Norton aka johnboy