Got a 3" high flow converter, and want to make a bolt in replacement, and use the gasket, and doughnut. Can i get the collector ends from walker or something?

 

https://www.summitracing.com/search/.../3-bolt-flange

 

Sorry... I don't do summit anymore. Those good days are old and over. Just realized o.e. is 2 bolt front, 3 bolt rear. Aftermarket stuff I have is 2&2. No easy answer I suppose. I go to parts store, and talk to someone who tries to know something. Thanks!