Use an exhaust manifold from a 55-57 265 passenger car engine. The outlet is at the front, and it gives enough clearance for the steering box that it doesn't have to be moved. They're on Ebay pretty often, and they don't cost much.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!