I had American Thunders dumped before the axle and it was too much with a power chamber ahead of them.

I changed over to ultra flo's and wow, what a difference. Plus you could look right through them, unlike the noisy flowmasters. In reality, through numberous muffler shootouts, they are all are within 3hp of each other.

The car is quiet cruising, still has the classic pop-corn rumble at idle (of course the cam hasn't changed but you still cannot mistake it for anything other than a v8), and produces enough noise at WOT.