Bolt them in. It's a T-60 Torx I believe. You should be able to just bolt in new seat belts. However, I only have experience with older Jeeps, and I am not sure if the new Wranglers still have this option because of more wiring, etc. I am sure that some Jeep enthusiast will come along, and better awnser your question.
5.25
They bolt to the center of the floor behind the rear seat
hello
It will bolt up, but the manifolds, flywheel, wiring are different. Also the 1997 head does not have a hole in the rear for the temperature gauge sensor.
80w90
I believe it is a Dana 30 in the front and a Dana 35 c in the rear
The 2014 Jeep Wrangler has 44.7 in. of rear hip room.
The 2005 Jeep Wrangler has 57.3 in. of rear shoulder room.
The 2011 Jeep Wrangler has 40.3 in. of rear head room.
The 2005 Jeep Wrangler has 39.7 in. of rear head room.
The 2012 Jeep Wrangler has 61.6 in. of rear shoulder room.
The 2001 Jeep Wrangler has 43.5 in. of rear hip room.