i bought a aux fuel tank and have installed everything but i cant figure out how to connect the fuel line to my main tank. the aux tank is in my bed which then goes to a fuel pump to pump it into the main tank. do i hook into the main filler hose or maybe into the vent hose? i would think the main hose but where do i get a fitting for that ?

I really can't help you, but I do know the Transfer-flow hooks right into the stock filler neck with an adapter you can order.

oteo,
how did you do it & does it work ok?
I just loged in for 1st time in ages & found ur thread with Filler Neck search.
I'm in the same place & my search results were not encouraging.

Thanx, Gben