Most my trucks have been set up with a vented tank, and no canister. And they've never leaked.
This is how I set up my suburban tank as well. Mines not a wheeling rig though
Most my trucks have been set up with a vented tank, and no canister. And they've never leaked.
So vent not into the filler neck?
My filler tube has a spot about 3-4" down from the cap that the vent would go to, and the other goes to the canister

You can’t run to the beer fridge you’ll start dropping weightYeah I actually hung out for an hour after it happened and walked out and drove myself home.
I got a knee scooter for zoomin at work. Been using the electric scooters as stores. Just sucks when they’re out and I’m stuck on crutches. I’m too fat to that for too long.
Carb cleaner and a fine tooth wire brush. And elbows
Nice dodge
Not a huge fan of those little Holleys. But get it sealed up and tuned, they run ok. First choice for your application would be a double pumper. At that price you’re 3/4 $$ to fuel injection