What main things to look for when looking at a 69 valiant?

Frame rails, tortion bar cross members, trunk floor, driver's and passangers floor, quarters, rear of front fenders, if engine swap is it V8 k member, BB K member, front disc, 4 piston Kelsey Hayes (OEM) or single piston 73??? up swap, SBP wheels would be OEM, 7 1/4 rear or 8 3/4 rear?