If anything, I might hook up that charcoal canister hose to the fitting. It'd be better than having raw gas fumes vent in the engine compartment.

If you four wheel at all, be prepared for the truck to stall at extreme angles. Webers are sensitive to especially being pointed downhill, I found. There's a fix, but I never got to fiddling with it. Somebody else can probably tell you what's up with that.

Enjoy!

John B.