Dart falls on it's face.

ramcharger said

That's assuming that it's jetted right to begin with at sea level. Don't forget that with all the changes you've made it's sucking way more air up in rpm range. I'm at a mile high and am running 74's all around on a .040 over 360 with a Lunati 60401 cam, 10.2:1 comp ratio and a 650 dp. The stock jets were 68's.

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not to side track but we both know that carb is too small if you've up'd the jets 5 sizes.
you are running pv's , explains the 74's across, otherwise 82 secondary.

I don't think his 256* cam'd 318 is gonna pull that 600 very hard.

he may be fine with the jets, but has he done any vacuum checking and have the correct pv installed?

I would keep the jets no more 9 sizes apart, so find out what secondary plate you have to convert the # to jet#'s and see if you are too fat on the secondary side, along with timing...find out when [rpm] the full advance comes in.

just a drunkin ponder.