My wife had a 77 T-Bird. The radiator hose split; the small one just from pump to block. I worked at a company rebuilding heavy truck brake boosters, so cut a short piece of hose to take home and fix one evening. Cut the old hose off, and started clamping the new on. Went to put the 2nd end on and it wouldn't go. After several attempts, I looked and the damned thing was 2 different sizes.....6" apart. Had to run to the parts store across the alley and pay $12(1983) for the right hose.
And, for the engineers that decided a fuel pump was best placed inside the top of gas tanks, ...eat shit and die you bastards.