283 Carburetor thoughts

[RTHarvey]

I've had my 67 C10 for while now. It has a 283 and 4-speed. When I got it, it had a quadrajet off of a 76 Cadillac (according to the numbers) and didn't run very well. I changed to an Edelbrock square-bore manifold and a small (600-650) Edelbrock carb. It runs better, but not perfect. Originally it would have had a 2-bbl carb, and the 4-bbl Edelbrock carb is really too big. I haven't really tried too hard to tune it, but I thought I would ask the forum for ideas on how to tune it, or if someone had a different idea on how to approach the carb problem. There doesn't seem to be much around in the way of 2 bbl manifolds or carburetors on the aftermarket. I've looked around a little for original manifolds and carbs, but they are pretty scarce too, and mostly pretty junky looking. Any thoughts would be appreciated.