A boy and his Station Wagon..

I bolted the intake manifold down today, getting closer and closer to getting it fired up!

I'm going to have a dual exhaust made for it, and was wondering what you guys think I should run muffler and diameter of the pipe wise. I was thinking dual 2 1/2 with summit welded mufflers and turn downs out the back. What do you guys think?
I just had a dual system done to my 74 dart 318. I had the guy put stock sized mufflers on it (after he put turbos) and it still sounds pretty loud. I'll bet the big stock mufflers would sound real nice on a slightly built motor like yours. You can still clearly hear the motor but can tolerate the noise inside as well.