Bypass hose and fitting dilemma

1983 318 with an early 273 timing cover and drivers side water pump. Holley aluminum intake.

Water pump and intake has no fittings. Just 3/4 pipe thread holes.

Here's the dilemma. I picked up both bypass hoses. Early and late. Than I picked up some 3/4npt x 3/4" barb fittings.

Than I discover that the late model hose is 1" ID (way to big), but the early hose is still 13/16". Lol.

3/4 npt x 3/4" barb is the biggest brass fitting I've been able to find.

The 3/4 barb fits the 13/16" hose "OK", and it might snug up with the hose clamps. But it dosent slip onto the barb as snug as I would like.

What's every one running and where do you get your fittings? Menards isn't getting it done for me this time. Lol.

Also need to source the 3/8 npt x 5/8 heater hose fittings as well.

Thanks. Eric