I have marbled my '01 with the 1/2 copper caps at the carbs and put the hose back on. I have richened the mixture and I'm still popping on decel. To be fair, I have noticed it more since I have drilled the baffles (4-1/2" holes each) There is also a good amount of blueing on the right pipe right after the manifold. Where might my popping still be coming from??