does it engage when you step on clutch
if it don't engage all way you may need to extend the rod going to the fork
or just go hydrolic I used a toyota master cyl and slave cyl for a 86 land cruiser it ran me something like $70. I got it at napa
slave cyl part # 37525
master cyl part # 39751
as for the hydrolic line measure how long it needs to be from master to slave and match it up with what ever works for your application
mine in the 3b was 29inches out of a Subaru
I don't want to say that's the length yours will be since your jeep is bigger than mine ,
if you convert to hydrolic you'll be glad you did