3.8L Mechanical Fuel Pump interchangeability ? September 09, 2021, 08:08:08 AM Hello, I'm curious if the 1983 carbureted Tbird 3.8L mechanical fuel pump will interchange with later fuel injected 3.8L blocks. If the last year for the carb was 83 and the first year for throttle body fuel injection was 84, I would not expect Ford to redesign the entire block just to eliminate the mechanical fuel pump. That said, it would only make sence to change the timing cover, or add a block off plate to delete the mechanical pump. I suspect the year the Tbird switched to serpintine belt there was likely a change in the block, or atleast the timing cover. Anyone know any details ?