Novak Conversions Jeep Wrangler TJ engine mounts

Brake pad problem

There aren't any 02 and older TJ rear discs. They started in 03 when the Rubi was introduced.
Brakes situated thank u guys.
Thinking ahead. May replace all calipiers with new. Blaine notice the spongy brake peddle. Should I change master to accommodate the Ford calipiers in front?
 
Novak Conversions Jeep Wrangler TJ engine mounts