1929 Tudor body on 1931 frame

[goodoldvic]

Is this a hard swap barring any repair I find I need to make? My frame is sagging on the passenger side behind the rear motor mount causing a hood alignment problem on the pass side. My driver side door hangs 1/2 low on the belt line alignment. No rust outs on the car body or frame. I have an opportunity to buy a '31 frame that has the emergency brake and service brake cross shafts in place and the running board brackets are there. FWIW my e-brake is to the front of the gearshift and my cars a driver. I've read Mr. Pluckers frame study and got some education like the moving of a frame to body mount, front crossmember height at the frame rails and changes to holes ect. I'll take any advise/hints the community can share. Apologies if a similar thread exists I tried the search feature. Thanx