What's your problem? That car is gonna run good. It may not operate at it's full potential, but what does? You're gonna have a blast driving it. Fouling plugs? Only after you wear it out for a couple years. Street manners? Don't sweat it, it is a big toy. Exhaust big enough? Hell yes!! It ain't a school bus. What I'm trying to say is have fun with it. It is the best one you've ever built. When it breaks, call me; I will be glad to tow it home behind my big ol' hooptie.