Well, I solved my hesitation problems. Before I built a water jacket around intake plenum I decided to try another carb. I had a 500 Edelbrock I had on a Rambler 6 years ago. I had modified the weights on the secondary air valve to make them heavier and slow the secondary opening. I had a notebook of all changes I had made to carb. I rebuilt it putting 35 squirters in instead of stock 28 and converted it to a electric choke. Hesitation is now gone and drivability is great. May still need manifold heat later when it gets cold but great now. Lesson learned, do not assume carb working great on one engine, blown buick nailhead, will also work great on another, turbo rambler 6. It also helps to keep notes on modifications you make. Thanks again for everyones help. Mike
