Roof Cutting

[twoskies]

Hey
ive got a cab that is rough except the roof, got another cab that the roof is the bad part, tree fell on it
has anybody taken a good roof off and put on another cab

any suggestions to possibly speed up the process

any tool suggestions, ive seen the thin line sanders, probably buy this weekend, but any other that anyone can think of

yes i know , its going to be alot of spotweld cutting, lol

Thanks