Except for the "Danger-Is-My-Business" aspect of leaning back against 22 gallons of highly flammable-explosive fluid, it's really a good set-up. The fuel pours into the tank fast with no problems. No air build up. You should have self-venting gas cap. It wasn't until '71-'72 that GM went with a gastank vent that vented out the door pillar for emission reasons. I had a Sub and have a K/5 and I always have to burp the flat tanks to get them to take enough gas. Fuel feed is sometimes a problem when the tank is in the rear, I have found. Never a problem from cab-mounted tank. You do want to avoid roll-overs or long skids down the freeway on the left side,
but I fail to see the attraction of putting a tank where my spare is. Where would I put that? Never a problem on a show truck, but some of us work for a living and a working truck is part of that life.
By the way -- welcome aboard.
