Fuel cell questions?

Lookin to get a fuel cell made for my astro, just wondering what i have to take into consideration? Like what do i need for ports?brethers ect?

its a v8 from a 89-95 fullsize chevy truck it'll be carbed if that helps

feed an return line

thats it?

filler, feed, return, and rollover vent.

If it's a carbed v8 you don't need a return line.