Need factory original cast iron Fronty SO exhaust manifold. This manifold has 2 round ports at each end and a square center port. The outlet end has threads for a stock model t exhaust pipe nut to screw to.
This manifolds allows a SO Fronty head to use a stock T exhaust. Any condition considered.
I have never seen in print or parts for anything other than a header for the Fronty SR or SR overhead cam. It was a racing head and would have never been able to use a stock exhaust. The T, S and R had available the cast manifold that would mate. Good luck in your search. MG
I second what MG posted above. You will have to fabricate an exhaust manifold from tubing. The tubing manifold is held in place by the flange on the center exhaust port. If you look on the side of the head between the exhaust ports you will notice two tapped holes. You can add flat straps between the exhaust tubes and pass bolts thru the staps into those threaded holes to help hold the end exhaust tubes in the head.
The end exhaust ports are counterbored so that the exhaust tubes can fit into the head and seal better. Hope that helps a little.
Thnx for the information.
That header is a later adaptation. Originally the center flange made the front and rear press into their ports. The SR was a full on race engine. Little care about leaking fumes. In addition to that the exposed valve train (from the bottom) and no pressure oiling doesn't make for a longevity contestant. Just as racing is today engines were torn down and tweeked between races. Just as my head the one pictured has at least 3/8" hogged off the bottom to up compression. The rockers appear to be 28 chevy the towers may be as well, just not Fronty. These heads are a testament to how well they performed well into the late 40's on some short tracks.