[Getter-Done]

Originally Posted by K10-Kansas

Thanks Getter-Done. That explains why I'm totally confused on the sizes.

I went ahead and ordered this one https://www.lectriclimited.com/tempe...ng-unit-117353

Since my female port on the engine is 3/4 inch standard, do you think the unit I bought will still need to be machined?

If the female threads in your head are truly 3/4" NPT.
Sounds like you will need a 3/4" to 1/2 " reducer bushing.

As Accelo had mentioned above,
I am not a big fan of reducing bushing or adapters.
It's just one more place to have a leak in my eyes.

Sometimes that is the way to go though because of all the changes over the years that happen to these trucks.

I have pipe fittings in a big box in the shop.
I still have to go and double check on some sizes of this NPT stuff.