A little info. If I change from a mono leaf to a mult. leaf on my 66 do I have to change the bracket on the rear end housing?
Different car(71 Nova) same concept though. Only thing I had to do was enlarge the locating hole in the spring perch for the leaf spring centering pin. I had a 1/4" shank drill bit by 1/2" drill size.
I guess a person could clamp the springs together and unscrew that pin and grind it smaller if need be, but I just enlarged the locating hole which could be done with a small die grinder and carbide bit.
I am sure someone with a 2nd gen will chime in for you, but I say it should work like mine did.