Yes it should work. Only thing different with the springs are the spring eye sizes which is irrelevant. Same length/width.
I just put a '73 12bolt in a '87 frame. It works. Easy check is to measure from outside to outside of spring perch.
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Chris Lucas
1973 Chevy C-10
1975 Chevy Silverado
Captkaos' Page
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Chris Lucas
1973 Chevy C-10
1978 GMC Jimmy (2WD) - SOLD
1987 R10 twin turbo LS
1991 R3500 SRW CrewCab
1985 K5 diesel swapped project
1989 K5 2WD conversion w/ Vette susp Project
Captkaos Customs
73-87chevytrucks.com