Thanks for the reply. Sitting in the driveway it will rev with no issues. it is only at the track that it does this. I have changed out the mechanical pump and went with a holley blue pump and regulator. I just changed the distirbutor cap and rotor today would you still think this may be a problem with them not ligning up.
I originally had an edelbrock 750 on it and then went to the bigger holley and so far everything I have changed has has no effect. I am at my whits end with it. Oh almost forgot to mention the vacuum advance is not connected at this time.
Thanks Sam