View Full Version : 396 to 427 ???
jackbn
06-17-2009, 08:41 AM
I've often heard that you can bore a pre 1972 396 to a 4.25 with no problems because the 396 and 427 in those early years came out of the same cast ?? Any truth to that ?
Tod74
06-17-2009, 09:41 AM
Yes you can I know a guy that did it, but I'm not sure which blocks you can do it with. I'd have it sonic checked first to be safe.
TS1955
06-17-2009, 10:56 AM
If memory serves me right it was the blocks with an IE or IF stamping. But like Tod said, have it sonic checked first.
TS1955