Last night I swapped from the Big gas & big speedometer Guage cluster with idiot lights to the Guage cluster with the rpm/oil pressure/temp guage... Etc. I love it. Only problem is oil and temp gauges are not working. Not sure why. Came out of a 92 mine is 93

 

I just did this mod. You need to replace your coolant and oil pressure senders for gauge ones.

http://jeepin.com/features/gaugeswap

 

I know this is an older post, but my temp gauge dose not work either and have replaced the sending gauge as well