Thought this might be usefull. Last month's issue of Rod & Custom did an article on economy EFI install. The article covered pretty much everything. The install consisted of a TBI (kind of like a carb) bolted to an adapter plate bolted to a 4 barrel intake manifold.
http://www.rodandcustommagazine.com/techarticles/0906rc_throttle_body_injection/index.html
http://www.rodandcustommagazine.com/techarticles/0906rc_throttle_body_injection/index.html