My friend Brian has the mopar performance 340 cam in his 1969 318 stock 9.2:1 compression engine stock bore and stock valve relief pistons. Also has the mopar closed chamber 302 heads and the thin .028 ths head gaskets with an LD4B intake and a 1406 carb 3:23 rear gears in his '72 Duster.
Also has TTI 2.5 X-PIPE dual exhaust on stock A body cast iron manifolds.
Yes it performs, cr is right at 9.5:1
We just laugh and look at each other when he puts his foot into it. Unreal!
It's pretty much you need to drive with both hands.
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