Originally Posted by Jon G
.......Or wait just a doggone minute. That room between your headliner panel and the top of your cab? That wasted space will become your new fuel tank and you can simply run a fuel line down through the roof pillar and into the engine compartment. And they thought I was sleeping in those industrial arts classes.

If it's a Suburban, you're gonna have to put in some bulkheads to prevent front to rear slosh!