Desoto-
Ok, I re-read what you are saying & now I understand it. This is mainly a wild street car driven on the street most of the time. I just don't see a pivotal point w/ valve train to cause this. I have done a visual on the heads & confirmed a .26/.26 int/ex valve lash... look good. No visible issues detected in condition of springs & valve train. Off idle is fine... it has symptoms in upper mid to full throttle. I agree with you, as you probaly know more than i anyways. heres my point: I hate mechanicals... this car warrants a electric in my opinion anyways. So no matter what, I am going to pick a pump- what do you think about holley blue/black? Thanks!! Scooter