Is there a list of part numbers for OEM hoses? I'm not finding any useful information in my search. The only thing I've found is for 74 and later part numbers.
No clue what the OEM's are but I just run a kit like this in my 72. I have rear heater from a 17 place chevy van, so that hose is larger than the front, I just made an adapter to fit into the stock T's
Some of the OEM hoses are still available from Mr T but not all and not kits.
I got mine from @cruiseroutfit. They had the ones you need as a kit. They are aftermarket I believe except for the bypass hose. I’m a perfectionist and these were just a bit longer than OEM so I trimmed them up a bit so there wasn’t like and inch of hose sticking out past the clamp. Not a dig in the kit; this is typical even in some OEM brands and is something I do haha. It winks at me.
Stock radiator, coolant pipe, and cast water pump?