Here are some part numbers I have aquired while restoring my 1950 3600 (original 216 engine).
May save you some shipping costs from a supplier.

Park plugs-AC/Delco R-45
Lower radiator hose-Gates #20230 (one piece)
Upper radiator hose-#21942
Non-pressure Stant radiator cap-#10230
5/8" fan belt Dayco #23425
Goodyear #24423