anyone put a 73-87 12 bolt in a 64-66?

[66coffin]

i'm getting ready to put a '74 12 bolt in my '66 c20, my truck has t-arms and coils, the 12 bolt is for leaf springs. i'm thinking of buying one of the kits with a adj. track arm and tube mounts. are there other ways to do it using what i have (c20 pan hard, orig. rear end etc.) or are the kits the best way? any help or ideas from you who have done this would be great. pics too.