Flowmaster on Buick Roadmaster ?

I want my wagon to sound like a nascar. Im thinking running a single 40 series Flowmaster with one or two outlets. Any sugestions.

I have flowmasters on my Wagon and they sound bitchin!

i have true duals with 2 resonators. I think im gona run two 40 series flowmasters. My neighbors are gonna hate me, but i think its gonna sound like a nascar