Why the overbore from 396 to 402
Can anyone explain GMís decision to overbore the 396 032 in 1970 to make
it a 402? And did they use the same casting or did they thicken/widen the cylinder
walls to compensate for the larger bore? [img]/ubbthreads/images/graemlins/dunno.gif[/img]
Thanks
Mark
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