[decooney]

I ran 4.0 power valves with 9" of vacuum and still did not pass with the 450 holley on the idle test. Once above 282 on the cam, the numbers are off the chart on the idle test.

I was able to get my last motor, exact same setup, to pass with the 282 cam, and a slightly smaller one before that. Once I tried it with the 295-300 duration cams - no dice!