timing water pump housing question

[DoubleDlover]

Does anyone out here know when they went from both heater hose nipples being 5/8 to one of them being 1/2 and the other 5/8?? 69?? 70?? halfway through 69?? thanks

[70 sublime]

70 Charger has the two different size heater hose
Not sure if it happened late 69 cars or not

[DoubleDlover]

Yes Many have told me the 70's are that way. But i wasnt sure if it was like the very last 69 was one way and the first 70 was different.. Or maybe a couple months before the 70's came out they started to change. I wasnt sure