Difference in 69 vs 70 cab

[Jb70c10]

Started redoing my 70 short Stepside a while back and afteri got the body back from blast the cab was really ate up with rust. Inner and outer rockers cab corners, a and b pillars, all around weatherstrip seal flange and front windshield gasket seal on passenger side inner and outer roof skin on passenger side, etc. any way, I started the long journey of repairing the rust and soon realized it was going to take much much more time and work than I thought and frankly had the skill for. I decided that maybe trying to find another cab might be a better option. I found a 69 model cab that is pretty solid except for rockers and a foulest of small places in the floor that will need patched. It is also the color I was planning on painting the truck anyway which is a plus. Anyway, I was wondering what the differences between the two year models are and if I would run into any major issues swapping the two......