Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
That's what I'm doing, plenty of people have done it, you actually re-use the spare tire carrier bracket. Easiest would be to have a filler in the bed, not sure how you'd plumb and wire it as a 3rd tank though.