Some carburated sending units only had a supply line, no return line, where as a fuel injected one had a supply and return line. The tank should fit if you remove the cross member that supported the spare tire. (small 1 inch wide "C" channel)You might have to build your own mount brackets. Watch for ground clearance. Some of the suburban tanks were 40 gallon ones and hang low, especially if you are putting it on a half ton 4x2.
