71 C20 to K20 questions ???

[c20olive]

Hey fellas, I'm looking to do a 4x4 conversion on my 71 c20. I've done some research an have found out it best to do a frame swap. So here's the question I have found a few frames but there all under 73 an newer suburbans. Will those frames work? If Im thinking right it should be just mounting new cab mounts an bed mounts...... I have also found a frame under a 3 door suburban it's a 67-72 truck but I'm not sure what model it is to be exact. So I have a few options just looking for a little advise thank you in advance