Ronco95

I have heard there are kits available for the 3rd Gen trucks to increase fuel tank capacity by two or three gallons of fuel. This kit has fittings that allow fuel to fill the top most portion of a fuel tank where fuel is intended to expand.

Does anyone know if a similar kit exists for the second gen trucks? I know you can buy add on fuel tank and Transfer Flow sells a 55 gallon fuel tank for the 4WD trucks since they have more room above the frame and additional ground clearance. I don't want to spend $1000 for a fuel tank.
I will spend a little money to work on my stock fuel tank though.

Thanks in Advance

Ronnie