An older thread, but Folks I know have used the "grease gun lines", having ends made up at NAPA.
For me, I use hard lines, with a loop.
Regarding dealer installed oil filters vs factory installed oil filters, BOTH were done.
If the oil filter was factory installed, under RPO 237, the canister was black, the top had white lettering on it.
The dealer installed oil filters had a blue canister with an orange top.
BY 1962, the 6 Cyl had a factory installed filter, as standard equipment. It was black.