Keeping the stock manifold is, IMHO, a mistake if you're going to do anything serious to the engine.
What is your power goal?
I could go with an Offy (in fact, I have a triple-intake Offy and 3 carbs, but I'm really looking to sell that) and a 4 bbl. Not sure if you can find the Cliffords any more, although I haven't looked that hard.
I'd basically like to get as much as I can get out of spending $1200 to $1500 for the total project. I'm not looking to make a race or drag truck, but the perkier the better.
