i have heard, not tried... yet...
that early mustangs work well, fit right between the rails.
also, there was something that i read once about using a 69-72 blazer tank. i think it may hang down a touch too much.... can't remember.
the biggest problem with any of these is the plumbing of the filler spout. do you want it just in the bed, or do you want to do something slick, like behind the licence plate or something else? one of the big things to look at with the jeep tanks is where the filler spout comes in....
