Looks like your using a HRH body. Give Jerry a call, they worked with GM Performance Division to build Jay Lenos 32 "Bow Tie" deuce. This car was built to introduce GM Performance parts LS-7 crate motor program at the 2005 SEMA show.
The sump is a problem because it is a gravity feed. I also think the engine a needs the factory exhaust dump valves to run properly.