The fact is and the bottom line is that the RA4 motor in both the A body cars and the F body where the same 370 hp motor, but the throttle opening in the F body RA4 motors was limited to make for that 345 Hp rating.
It was pretty easy for a test driver back then to see the different names on the hood scopes of these cars to know what they where driving, no less taking a look see under the hood.
As far as production goes Pontiac like all GM divisions started production of the next years model run in Aug of the previous year which means that development of parts started well before that as can be seen in McCarhy’s second book on page 185 of the one of the first RA4 intakes in 68.
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Last edited by 25stevem; 09-22-2022 at 03:28 PM.
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