I have a 1975 Cadillac Fleetwood, which was the first year that Cadillac introduced the rectangular headlights. I'm curious to know if it would be possible to swap my rectangular headlights for the round ones from 1974 or earlier, and if so how I would go about doing it. If anyone knows, or has done something similar to this themselves, please let me know. Thank you.

74 and 75 were almost identical should work,check with a body shop or a salvage yard.some have interchange manuals,or cd s. telling what will fit what.

Good luck finding parts for a 74. It's a one year front end.