Help , another door alignment question

[twoskies]

1966 C10
PO had welded rockers, cab corners, a&b pillars, not a very good job
doors are out of alignment
driver wont latch at all
passenger will latch but lifts a little

ive checked with another 1966 C10, got cab measurements and ive got another set of doors, so i can verify measurements

Question is, if the cab supports and bushings are wore or bad, will it make it do this

I can weld in new supports and install bushings first if this is what needs done

Thank's