Brake booster question

I noticed that the brake booster from my 95 parts XJ is the same diameter but much thicker than the older models that I have laying around (86,92,&93) . Is the 95 model a dual diaphragm model ? and if so would it work better in my older XJ than the older unit ?
Dave

There is a write up on www.madxj.com about the swap. He gives all the details.

Thanks

Thanks for the link, it was exactly what I needed. I have two of the newer style boosters a 95 XJ and a 99 from a TJ. The ones I have don't have the long rod but look more like the old style so my swap may be easier. I'll have to go and do some measuring.
Thanks,
Dave