We're in the same boat at this point, I've got an old Ford dual plane high rise and a 600 Edelbrock carb and headers sitting in the basement just waiting for a few other major changes before I put that stuff on. I plan on keeping my stock cam for right now and know I'll get plenty of hp with the simple bolt. I might do a cam later but that's a big might! I'd get that bigger carb and get another intake, you'll need that bigger carb with that cam anyway. Have you tried buying an intake off ebay? That's where I got mine and some of those intakes go cheap but I wanted a specific one so paid quite a bit. That old Ford dual plane high rise really gives you some great torque and hp.
I don't know how much having a shop do your heads would cost these days but it won't be that bad considering all the gains you get. Do you still have the old distributor with points.....put an electronic conversion kit in it and that'll really help.

I like that cam you listed....sounds like a good one.