PJ thats a great post.I am getting lazy and should have asked more questions of the OP.If all the details you mentioned are dealt with,then this car should go quite well. Im not a big fan of any really big hydraulic flat tappet cams myself.I figure if you step up to the plate and build some serious power,then I think a camshaft is a good place to pick above average parts.
Again,I forget about blue printing being a standard procedure.90caprice408 we will get you going soon,dont worry.I had a similar problem with a combination before with a 350 with what I thought was going to fly. I just bought a set of heads from Lee Shepard and I had a big solid cam with 5.13 gears.The car was a turd.
Turns out it was a bad converter.After I replaced the converter it came back to life.