If an adapter plate will fit the y block, it will fit the 223 six. If a flexplate or flywheel will fit the y block crankkshaft, it will fit the 223 six. The adapter kits are expensive, maybe the best choice is to fit the later model automatic model c5 or fmx. They might fit the early bell housing too. O-Ring Seals on Bellhousing Face Prevent Leaks Requires Removal of OEM Bellhousing on OEM Cases Requires use of 93010-C or 93009-C style wheel AND crank adapter 80013 or 80012, for Modern Hemi use 93010-CH and 80027
Here is a list of Mopar Engine Casting Numbers.They cover a wide range of engines including the popular 318, 340, 383, 400, 413, 426, and 440 engines. You can find your casting number on the left hand side of your engine.