[George Snyder]

Turnpikeboy,

The carb should have come with 70 & 78 jets. I am using 64 & 67 in my holley on the 302. Are you some where close to that? If you still are rich you may need to raise the power valve setting. It probally is 6.5 which is standard.

You may want to try and set your idle speed more from the secondary screw than the primary. Sometimes this will help with the stumble. It did for me, but mine was very minor.

The Demon on my SBC is a marriage made in heaven. A few minor adjustments, raised the secondary jet to 8o, perfect!

Is your 650 mechanical secondaries? If so and you want to trade your Demon for my Holley and some cash let me know. Holley is 4777C.
Bud