The motor mount lift will end up causing the bell housing to connect with the fire wall. Not to mention the fan into the shroud. Rubicon era Jeeps have a larger cavity for the t-case, does not help at the firewall clearance.
The JKS body lift is 1.25" and they are nice pucks that are larger diameter than most and actually wrap around the rubber body mounts for a nice secure fit. Combined with the JKS 1" MM lift, both mods counter the negatives of each's installation. The JKS body lift is not really noticeable.
What you will now notice is that with the MM lift, the exhaust now vibrates on the frame end of the UCA pass side. It was only annoying for a few months before I cut the mount off and put in long arms