A good friend of mine is abandoning his 51' 3100 project and offered me the frame and chasis with 4 wheel disc, rear 4 link, rear coil overs, dual master cylinder with proportioning valve, independent front suspension, aluminum radiator, Tahoe 5.3L motor and 4L80E transmission. It's all set to put my cab on it. My question is will my 54' 3100 cab and bed fit on the 51' frame. I know it changed a bit after 53'. Any info would help. Also how much would you pay for this chasis? He's going to give me a deal. Thank you.