Difference between Stealth and SSS valve?

Has anyone got any exploded drawings of the Stealth and the SSS valves. I am trying to convert my Stealth into an FAC gun, now that i have my licence. I can only imagine that the top hat and stem has a much larger ID and the valve spring retainer has a much larger hole in it. Also, i guess that the inside of the valve has a greater volume? So, to see some drawings or photos would be very appreciated.

Thanks all……