Power advantage between Ford 351, Mopar 340 and Chevy 350??

66fs said

Boss 351: 11.7:1 forged pistons and 290* duration solid cam.
LT1: 11:1 forged pistons and 317* duration solid cam

340: 10:1 cast piston 268* duration hydraulic cam...

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Also, there were many more Dusters, Darts and Demons built with 340s in the years the LT1s and Boss 351s were built. The sources don't all agree on the numbers, but the totals are overwhelming.