What's going to hurt you is that you're running power brakes. I don't know of a lot of Cobras that have vacuum boosters, and it hinders the "window of opportunity" by quite a bit.
I have enough info and if you're happy with the powerband of the engine, I would stay with something pretty similar, albeit with a higher tech lobe than the Edelbrock cam, and stick it on a shorter LSA. It would sound pretty mean but wouldn't ham-string you on performance.
Shoot me an email if you're interested...
brent@b2motorsportsllc.com