Thanks for the replys. Sounds like the Performer RPM. I like the air gap idea, so maybe we will try that one. Sounds like staying with the 650 will be fine.

Any preferences between Edelbrock, Holley, Demon?? I am not having much luck with the Edelbrock - I just can't seem to get it to run very well. I have a Demon 750 I borrowed on it now and it does run smoother.