@49fastback Well no one has responded about PCV hookup. If you have the Holley 390cfm, looks like you just use the manifold vacuum port at the bottom of the throttle body. You didn't say if you had power brakes too. The Offy has a port for the power brake connection on it, but I don't know if the Clifford does?

Were there any other vacuum accessories you were planning to run on it? HEI advance? EFE flap in the stock manifold? An Evap canister or just a vented gas tank?