Yes in fact if I hadn't already put so much into the hydraulic system I would have gone full air.
This hydraulic over air valve makes it pretty easy though actually easier than the full conversion.
The valve and some plumbing makes up the entire service side of the system. The control valve in the cab a standard relay valve and plumbing will make up the supply or emergency side as long as the system is not braking the prime mover the compressor can be electicly driven no engine driven compressor required.
It is how they are equipping hot shot trucks to tow air brake trailers.
