It seems a few of the things that you're saying are backwards to me and again not meaning to knock on you or anything like that.. with the gearing you have a taller tire is actually going to hurt you and Gary you up even worse.. I run to Edelbrock 600 on top of my dual quad tunnel ram on top of my 410 Stroker and I get way better than 6 miles per gallon that's some kind of ridiculous... I had a different cam in it or I should say a different grind on my shame Cam and it was much louder and crackled much harder and barely kept an idol.. again I go back to the cam change or I had it reground to a less aggressive profile and now it actually quieted the motor quite a bit. It's still radical don't get me wrong but not is crazy as it was... Also if you start a car that has a pretty radical exhaust in a carport or somewhere like that where you get a great Echo it's going to personify it...
