I've got a JAZ (I think bought it 8 yrs ago,it's black)16 gallon.It only holds 12 gallons w/foam.I mounted it under the bed where the spare tire went,used a 4 1/2" hole saw drilled a hole in the bed above the filler cap.Since then I've replaced the bed floor with aluminum,and put a trap door above the filler.
Every cell I've seen mounted in the bed ends up collapsing.Mine hasn't changed shape yet.
Mallory Comp 140 with a return style regulator.#8 braided line up to the carb and back.
I'm running a 406.Go to www.dragtruk.com I'm #22 in 1/4 mile times click on my name and it will take you to some pics,finally got a motor shot on there.I'm to computer stupid to get them to post on this site.
BTW: I think in one shot you can see the fuel cell in the rear.