1/2 ton springs on 3/4 ton. Will they fit??

[desert-rat]

1969 GMC 3/4 ton. Search bar not working. Rear leaf 2 1/4 wide 52" long. Trying to lower the truck but keep the 8 lugs. Some say I can use 1/2 ton front coils, so lower coils springs are easy to find. Who make 3/4 ton drop spindles??? The truck has factory disk brakes from a 3/4 ton donor. I've already remove 2 leaves from both side of the rear. It leveled with front and rides a WHOLE lot better. But maybe 2 inches more all the way around. This is a lot to ask for, but hopefully I can get some more help here. Thanks all. Oh ya, the truck will NOT be doing anymore 3/4 ton work. Its retired now.