....This is confussing me! I am planning on running 1/2" fuel line {which by my understanding is -10 AN?} so I will purchace -10 AN line. But most fuel pumps have an inlet/outlet of 3/8" NPT. A few pumps have 1/2" inlet/outlet. I am concidering running with 1/2 " inlet/outlet. So why would you run 1/2" {-10 AN} line and then go down to 3/8" to get into the pump? Doesn't this restrick the fuel flow? There is a better selection of pumps with the 3/8" in/out, I would rather pick one of these but this concerns me..... Please explain this to me! Bill