[kipps]

Also, before you buy a new tank, drop your old one and look it over good. Compare the measurements to see what tank to buy, and also look for any modifications that needed to be done to the tank to make it work. You'll likely need to make the same modifications to the new tank.

A blazer/suburban tank will have some conflicts with the shock mounts on the 1-ton trucks, since the c30 and k30 moved the shocks inboard of the frame. One option is to clearance the tank a little with a hammer. The other option is to move one of the shocks to the front of the axle, so that both shocks are forward of the axle, instead of one in front and one behind.

Also, it's possible some mods were done to the filler neck on the tank to increase clearance. It's better to know about any necessary mods before you buy tanks instead of afterward. That way, if you decide it's too involved to duplicate any modifications, you can still resort to plan B, and run the factory side-saddle tanks.