Use Edelbrock #2750 Performer 351-2V. It's a 4-bbl manifold designed to match the 2V heads. Will not accept Motorcraft carb.

The 351C 4V heads are considered junk by most street engine builders because of the overly large runners and doglegs. You can't get any low-rpm torque out of them.

Join up on this forum and do a search for whatever you're looking for. You'll find more 351-specific info here than anywhere else....
http://www.network54.com/Forum/119419