FITech Installation - Vent Line

[NC_John]

I'm starting the FITech install on my farm truck tomorrow. One thing I've been thinking about is the instructions being so adamant about running the command center vent line back into the fuel tank.

Since our trucks are pre-emission and don't control/scrub the gas fumes from the tank, I can't see this as being critical. I suspect the directions mandate running the vent back to the tank for retrofit on newer vehicles that may have controlled venting/charcoal canisters etc....

If the gas tank vents straight to atmosphere anyway, what's the point running the vent line back to it? I think I am going to run mine down the frame away from heat/exhaust/any sources of ignition and just let it go. I'm also thinking about getting an evap canister from a newer vehicle and hiding that underneath but am not sure how long it will stay effective.

Thoughts? Is there any other reason why they want to do this? In case the electric pump doesn't cut off it will return the fuel back to the tank?