So I've been playing with fine tuning since I need to save some funds before I rebuild the 360 motor I have. Played with the carbs a bit and then had an idea with the new mufflers. I removed the packing, and wrapped the baffles in exhaust wrap, essentially making it just a straight long pipe. Yes it quite loud,, but I be damned there was a noticeable improvement in acceleration. Kinda cool I thought.