If the driving will mostly be near the same altitude, a carb with electric choke will work good and is inexpensive. If you plan to drive cross country at various altitudes, the FI will self adjust for the different altitudes.
Return line should not be an issue, it helps keep the fuel pump and lines cool.
The Professional Products ProJection III is pretty affordable TBI unit (about $1,500), and MSD is going to release their Atomic EFI in a months or two for around $2,000.
The Edelbrock Pro-Flow XT is a neat TPI type system, but costs around $4,000 (although it comes with a new manifold, and distrubitor.)