Re: Pontiac Combo's
Some other considerations might be:
68 350 now that it is refactored to 305
71-72 455
74 LeMans 350 (like Bill Rink's Ventura only at 250)
I suspect that several more are good combinations with the valve job rule and current valve train technology, but $$ and the small Pontiac population have kept the development stifled.
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