Tom,

Will the front of your bus raise from the full down position to the full up position without lifting the tag?

Can you speculate and let us know what aux air pressure it takes to raise the front to ride height?

It sounds like you have the correct fronts. The number for the rears corresponds with the one on my drive axle only. The tag has 630126.

For those whose front air bags are part number 630260 it is possible that air bag is for a seated bus, and that is why you cannot get full up travel. Apparently that is the air bag number that will be supplied and it is not suitable for a motorhome which relies upon the level low system for leveling.