They are not the same, if you are just trying to raise the rear end a bit, I used to put same year El camino Springs in, I tried A-Body Station Wagon Springs once, but they were a little to Stiff of a ride. But the 73-77 El camico springs always worked on my 75-77 GP's.
74-77 should be the same, the 73 springs are a bit lighter as they did not have the 5mph bumpers on the back yet.
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Jeff R
60 Jaguar Mark 2, 3.8L Automatic
67 Sprint Firebird 230 OHC-6 4-Speed A/C
78 Catlina Safari, Pontiac 400 powered
77 Astre Formula, 215 Buick V-8 T-5
73 Lemans Safari, 400 4bbl 4-speed
71 Catalina Enforcer, 455 4bbl
06 Mallet Solstice #024 LS2, Now with a Tremec 6060 6-speed!
2012 F-150 Echo Boost (My local Ford Dealer SUX!!!)
2020 Dodge Charger Scat pack (recovered)
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