71 Suburban convert to 4x4 LS Swap

[CBledsoeIII]

Hello everyone. I just bought a 72 4x4 suburban frame and decided to go from 2wd to 4wd. I’ve tried to do some research on LS crossmember but from what I hear you have to fabricate DD and PF both in one way or another Not worth my money.
I still have the original crossmember uncut and I want to keep it that way.
Have anybody got Dimensions on a set of brackets they created.
I am running a 4” lift so I know I have enough height clearance.
I don’t know how to post pictures yet here with my mobile but my IG is fantastic_beast71burb