Thanks for your pictures.
Is it right that this seal comes between the manifold and the exhaust pipe:
https://www.classicparts.com/1950-86-Exhaust-Pipe-Donut-6-cyl-V-8/productinfo/86%2D048/
Wolfgang


I'm working on a Chevy Pickup 3600, build 1953 with an 235 cui engine.
Here you can watch my truck: https://www.kripahle-online.de/unterricht/?page_id=2532