Re: 69' amx
Jeff,
I thought the cylinder heads were the same casting.
Don't the 69' S/S "Crane' heads have slightly larger combustion chambers, due to machining for valve schrouding, and not casting.
I think Kaplan Engineering has something discussed about exhaust flow
and the major incease in flow developed at higher rpms, with the 'dog-leg' design.
Just read my old 68' Drag Performance Mag
1968 AMX 390/315,,E/S
With Doug Headers, 4.44 gears, 7' slicks, Schieffer clutch package, and dyno-tuned.
13.07 @ 108mph
PC
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