If someone is happy with a Set of Exhaust lasting 3 years/20,000 Miles and then start rotting at the Front Header all well and good but My Set is trash now and ordered a Set of Bassani Road Rage 2:1's after talking to a couple of Pros and said that's as close as going to get Tuning Wise for the Carburetor and may not even have to do a thing except slightly richer or leaner .. Meanwhile why waiting for the Exhaust going to open the Cam Chest and take a peak while the Exhaust is out of the way, Should be fine but only take a few minutes to do it now ..