Thanks, Woo, for the link. That looks like a great forum. Thanks k10 and hoggy for keeping this topic going.

Ok, I've been sick at home this week and spending some time on the net. Here's something I'm thinking. Please tell me why this wouldn't work:

Until I get my own truck, I'll take your word for it that a tank won't fit in front of the rear axle. So I need to put it in the usual spot in the rear. The Blazer tank hangs down for all to see, thus being an obvious customization.

The 25-gallon Blazer tank is 28.75"x28.13"x10.75"
How about these tanks instead?

1) 1941-54 16-gallon Chevy tank 27.5"x19.5"x7.5" http://ruttersparts.com/i-891840-1941-48-chevy-die-stamped-steel-fuel-tank-48cg.html

2) 1955-56 16-gallon Bel Aire tank 25.25"x25"x8.25" http://www.1aauto.com/1A/Gas-Tank/C...dium=cpc&utm_campaign=google_base_ds

I like the cut of the inlet better on tank #1. Is that what they call a baloney slice? I believe that's what markeb was saying he needed to make his plan work earlier in this thread.

Both of those tanks have a smaller height than the Blazer tank. Whether or not they are short enough to not hang down, I don't know, but it would certainly be better than the Blazer tank.

Also, instead of 28 inches from front to back, they are 19.5 and 25, respectively. I like this from a safety point of view because it would leave a small gap behind the tank where some frame reinforcements could go, or it could be just some extra space there. This would be slightly safer in a rear-end collision.

Also, the 16-gallon capacity would be lighter and better for gas mileage, and if the tank did rupture during a rear-end collision, there would be less fuel to spill.

That's what I've come up with so far. There are still plenty of tanks to browse through.

What do you guys think?