this is not easy but i have been called master at this ?shim the cowl up or back of the body down. things can go bad fast so go slowly.take a cut off. cut lose what stops rocker. bracse etc. from getting the belt line to match. make sure. door laches are out they can pull door up or down.when you get it were you like it. look at door gaps the roof lines and rocker gaps if lines not rigth tape line on the door so gap looks good .and sand edge of the door so it looks good .bending hinges is not good it will put door in binde and makes gaps door to cowl off try to get it to line up. if you need the door up or down make shims and put behind the hinge . if door needs to go up make thin shim s.the bottom hinge or reverse.this technique. building up or sanding door edge is common.it is easy on glass body hope this helps. if you put the body in binde it will crack so if so if it has rockers you will have to cut them lose. go slow do not get nuts with off