The recomendation made to me and I followed it, years ago, was the Racer Walsh header with the collector next to the engine, with a 3in secondary pipe. Ours was custom bent at a local muffler shop (Muffler Man), followed the contours of the floor, and dumped down just in front of the axle. That way we had the pipe nestled partially into the tunnel.
It had a somewhat loose connector, and the pipe was carried high...barely visible when looking under the car. We never had difficulty with cracked header tubes, or lack of security of the pipe under the car. LOUD!
There could be changes, as that was a few years ago. I'd recommend going to the MiniStock sites where the 2.3 is very commonly used, and inquire as to what is current thinking for exhaust technology.
Good racing.
Bill
Bill Frieder
MGP Racing
Buffalo, New York
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