1995 GMT400 LS QD Fuel Connectors FYI
If you're doing this swap, take your fuel lines from the filter forward, swap out the rubber sections with high pressure line, cut the whole length of braided nylon and QD connector from the GMT800 lines and crimp them onto the GMT400 lines. The whole length of the braided is just enough, so make sure you cut the whole thing.
Dorman has the 800-120 & 121 part numbers if you just want to use new braided nylon or SS. I don't know what the crimp sleeve part number is, once I find it I'll post it.