Treblig's doughnut?

That doesn't look too bad to make. Start with a 120* section, cut a wedge from the flared section, then cut be careful to install the flange section or weld in a bolt or something before closing it up. Your pictures are priceless in this adventure. Really, thank you very much. It all seems very doable now.
If you have your car on a lift and all the pieces that you need then it's not too bad because you can piece it together on the engine and assemble all the pieces avoiding the steering, torsion bars, starter etc. I had to figure out how to make a 120 degree down pipe that was universal. It had to fit every A body without having a car on a lift to fit all the pieces together. Glad everything worked out for you and that you happy with your car!!!:thumbsup: