I have both the Haynes manual and Chilton manual but neither seems to make replacing a heater core simple, just remove the two bolts on the fire wall and to will all open up. The reality is there are no bolts in the firewall for that purpose. I got frustrated enough, I took it over to the Jeep dealer and he said $1100 please, it's an "all day job". I'm retired and this is my toy, so I have the time and I already have the core and seal, but I don't have the knowledge. The Jeep dealer said you must take the whole dash off, that's what costs. ( 95 YJ ) email@example.com
or the forum.