Limits of an Edelbrock performer and 1405 600cfm carb

Yeah, I wasn't gonna go magnum, but it's basically free. So I figured I would see what I had to do other than intake manifold and carb. If I don't have to buy another torque converter to work with the magnum engine and I can just use the one I already have that would be the best. I'm pretty broke so I'm trying to do this on the cheap.