I have a 1949 3100 basket case with a 216. I have purchased from a 1954 3100 a high pressure 235, drive train and axles. I am in the process of ordering rear engine mounts and see there is a different rear engine mount style between units up to 1953 and those 1954 and later.

The different mounts are they related to the frame (1949) or the drive train (1954)?

Thanks for your input.