Blueskies,
I did the same thing with a 6 cylinder '51 Ford, years ago. Those Smitty's can't be beat as far as I'm concerned. Later, I re-did the pipes, running each out of different sides, just behind the rear wheels. It never sounded as nice with the shorter pipes.
Loved your site! Great job on the car, too. I hope to build a MOPAR 230 soon.