Which transmission for Edelbrock engine?

[rdplyr]

I have purchased a 68 camaro with a new Edelbrock top of the line Performer 350 engine in it. the engine costs 6500.00 from JEG's (aluminum heads, forged internals, the works...)

I wanted to do a LSx swap, but I can't justify the money in pulling this engine out. The problem is the car has a 2 speed powerglide transmission.

My question is what overdrive transmission would work best with this engine?

Thanks