I read all this stuff on Throttle Body EFI because I recently converted My 3.9 from Carb to an aftermarket TBI. Mine is a one model fits all unit. From 150 to 650 HP it says in the advertisement. Frankly it looks like an electronic Carb on a V8 as it is mounted on the same intake manifold as My Carb was mounted on. However: so far, other than it was difficult to get a steady idle (it is now at 1,000 RPM + or - 50 the unit has performed very well. I now have over 5,000 miles on it and did relocate the oxygen sensor inboard to the header that improved the idle but still can not get it under 1,000 RPM. I can live with that. But what do I do if it fails while away from home. I have a metal brief case with all the parts I need to convert back to a carb. Should the TBI fail I will call My Daughter and have Her send the brief case to Me. I even wrote a procedure for converting it back to a carb so I don't forget something. I could carry it on the luggage rack if I don't carry a passenger. No way in hell could I make a Field Repair.
