say what!? this is a pretty common swap for CJ guys. Google it, you will find tons of info.
cliff notes shooting from the hip...
Rear body mounts need to move outboard about 1"
The body mounts right in front of the rear wheel are close, need to oval a whole , knock a weldnut loose or something.
The other 3 (x2) mounts are spot on.
CJ front fenders bolt on.
YJ tub will need ovals cut in the tub for CJ-defrost duct into the windshield, if you keep the CJ dash, etc.
Firewall stuff needs a little attention.
YJ fuel filler hole is on the wrong side, cut a new hole for CJ.
Roll bar mounting might not be 100% bolt on.
rear CJ flares will fit the cutout, but a couple hole need to be drilled. You could keep the YJ flares, they are a little wider (my CJ has rear YJ flares)
You'll have a gay sideways tire carrier rear door until you fab the CJ tailgate in place.
oops, and I think the pucks/bolts are differnet, you use the YJ body mount kit. I would google that one to be sure.