hi all : I ordered a new tank for my '62 2000 4 cylinder gas tractor and upon inspection of the tank bottom where the fuel shut off valve is to be mounted--- the screws size is smaller then my old tank where the shut off valve mounts ??? The shut off valve screen enters in the tank ok but I am concerned that when I tighten the valve onto the tank and then tighten the fuel line on the valve that I may run into problems loosening or bending the smaller screws ?? The original screw size is 12 X 24 however, the new tank takes a 10 X 24... has anyone ever run into this difference before ????? Thanks for now