1970 C/30 step want trailing arms!!!

[88lsiroc]

Am I correct in assuming that I would either have to position a stock trailing arm cross member farther back to use stock trailing arms? Which would no doubt change where my carrier bearing is. Will a stock cross member fit a C/30 frame? I'm also just looking at making it all. I got hammers and torches. I'm not a run out and buy aftermarket kind of guy. Nuke1 built some simple cool arms. I just happen to have some ballistic joints from a Sammy rock crawler project.