Your passenger car has unique side mounts, so best bet is to locate a motor that had those same mounts. You'll be limited to a few years that are also full pressure, 54 blocks will be the one you want, has full pressure oiling, side mounts and the high water pump like your 216. Happy hunting.
Go to Patrick's Antique cars & trucks online catalog has pictures of all the various mounts.
http://www.patricksantiquecars.com/If your motor has front mount then that's even easier, swap front mounting plate to any later 235.
