Going from leafs to coils, should I?

[Mad Viking]

I have a 71' 3/4 ton that has leaf springs. I found on Craigslist a deal for trailing arms, crossmember, coils and misc parts for $150. This came out of a 71' 3/4 ton. First, is this a good deal for the parts to convert to trailing arms/coils? Second, is the conversion difficult to do, kind of put the crossmember in right and you're good to go or is there more modification than that. Any advice will be helpful.