[danc30]

The fitting hole on the fuel pump is 3/8" NPT. (at least mine is) You can get a fitting that's 3/8"NPT to fit in the pump and the other end is -8AN. They are very close on inside diameter and both are bigger than 3/8" hose or tube on the inside. Buy a couple fitting and look.

Go 1/2" or -8AN all the way. Why take a chance? (Use aluminum tube for as much as you can as it is less restrictive)