Suburban/Blazer gas tank bolt-in to LB? (searched archives)

[I1502]

I was at the pick-part yard looking for a good rear bumper and hitch for my 3/4 LB. I now see that the Suburban frame drops at the tail, for some reason. I know, I'm just learning.
I then noticed the big center mounted tanks in the Suburbans and Blazers.
Will this bolt into my PU? I searched archives, and didn't find any solid answers, maybe I used the wrong keywords.
I actually saw a 73-87 PU go up in flames after being hit in the side. I'm not really worried about it, but if I can easily bolt in the Suburban tank, I'll do it.
thanks!

I1502: 66 GMC 3/4 LB
(new!)86 Chevrolet 3/4 LB 26,000 orig. mi., one owner.