Regulator placement -- EFI setup

Option 1aa would be simplest - fuel pump to regulator w/ return to tank, then single line to TBI. No need to run up and back to TBI and that saves a lot of plumbing. Indeed, since ~2000 new cars must have a "return-less" system, i.e. a single fuel line to the engine for less emissions from hot gas. If you run 3/8" tube from reg to TBI, should be minimal pressure drop. For an inexpensive reg, many people use the Corvetter filter/reg (19 O-Reilly's) which maintains a fixed 56 psi if that works w/ Accel's TBI. Has 3/8" quick-connects. I use on my Dart.