Not sure what the differences are in the rear suspension. I have heard the shock mounts are in the wrong orientation though, in front of vs behind the wheels, or vice-versa.
Be all careful when checking pics of restored/new-built chassis with the original ones. Be still more careful with the 80", from 1948 to 1953 the vehicle evolved a lot and many parts, fittings and details appeared, changed or went away. With the arrival of the 86" (longer chassis and body) production was made in a truly standardized way.
The rear shocks one faces forward and one backwards…oddly the correct shocks are provided in the kit .
Seats are the wrong type for the version .the engine is a later version applicable to the 86 version
Chassis is configured for an 86/88 version