Windshield washer tank

Not all '64 models had windshield washers. If this is a conversion, you may need a wiper switch with that option too. I'd use the plastic bottle version unless this is a 100 point restoration. The pump is mounted separate from the washer bottle and connected by a hose. The bottle is available new....not so sure on the pump.
My car had that option, but there was no jug in it when I got it. I have the original pump and a second aftermarket pump as well, and they look identical.