I t appears to me that you have a mismatch between the exhaust manifold and the exhaust pipe. Your manifold is designed for a donut, while the exhaust pipe is designed for a flat gasket.
Will a donut seal this mismatch? Probably. Is it ideal? Probably not.
I have seen what can be described as a hybrid donut which only has the taper on one side while the other side is flat which will seal your exhaust pipe better.
I do not know who carries that part however.


1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission