What size exhaust pipe?

I putting a 1998 Chevy Vortec 350 in a 1952 Chevy sports coupe. It's running the stock fuel injection with a custom harness. I'm using Sanderson headers and have some dynomax turbo flow mufflers: 2 1/2 in and 2 1/2 out. What size pipe from muffler to tail pipe is recommended?

You could run 2 1/2 being that's the size muffler you have, or you can run 2 1/4 and be a little quieter without a loss of performance for a stock motor.