Demon beat me to it. I'm running a '90 roller lifter block in my build. I bought a used crate engine for $300 and sold all the parts that I'm not using, so I have $100 in a standard bore block. These blocks can be found pretty easily in trucks and vans of that era.
Your build sounds pretty close to mine. You can click on the link in my signature to see it.
If I didn't have a machine shop/engine builder close to me that I trusted, I would have Brian (OU812) do the heads and let him chose a cam to go with them.