Unless you're racing, a standard 5-6 qt pan is plenty big enough. Just because it's in a Cobra chassis, doesn't mean you need a fancy racing pan.
Canton pans can be problematic. People have trouble getting them to seal. And sometimes they leak at the welds.
Kevko makes a good pan. If you're not racing, this stock appearing pan will work fine.
https://kevkoracing.com/collections/...ing-front-sump
If you are racing, then I would consider this one.
https://kevkoracing.com/collections/...nt=34322728846