Well what I'm doing is a 383 LT1, but for the most part you could probably learn from my mistakes....

Start with a block only... You don't need the other parts anyway. In fact you will probably get a better deal on a 350 block with nothing in it. If you know what casting numbers you are looking for you might even be able to find a decent one at the local salvage yard.

I can get you some casting numbers to look for if you want.