Square body tank swap

[Burbnasty]

I've searched lots of old threads about swapping a square body tank into the 67-72 suburbans and I found info on the pickup trucks and some limited info on our trucks.

Does anyone have any experience or info on the swap.

I think I want to use a 31 gallon tank because it looks like it wont hang down as far.

My tank smells of old gas and the only replacement I've found is a 21 gallon tank, I don't think anyone makes a larger one that i have seen.

It looks like the filler neck is in the wrong place on the square body and I will need to remove a cross member.