Yeah I've heard about Kolaks kit but couldn't find it when I searched the forums. I'll email him and get more info, thanks.
I've always used Autolite platinum plugs in my Kolak Ignition Upgrade kit. Here's all the information - JeepForum members get 10% off the below pricing:
My recommendations for the 5.2/5.9 ZJ ignition system are designed to improve idle quality and throttle response, and to improve and maximize current transfer. This really helps support other modifications. Here's what I recommend:
Magnecor KV85 ignition wires
MSD high output replacement coil
Coil adapter pigtail harness for '98 Jeep
Heavy duty US made brass terminal distributor cap with rotor
Autolite platinum plugs (one heat range colder than stock)
You still have to PM him for pricing. If you want the best, though, his package is hard to beat.
__________________ March 2014 GCOTM. 1998 Deep Slate 5.9 On the Jeep:Hot intake, 52mm TB, Summit 8mm wires, catch can, 703s, insulated fuel rails, indexed Champions, Bilstein 4600s, Eibach lowering springs, Moog SS, Ironman mounts, Lotek 2GP, lots of gauges, sparkly paint. In the garage: M1 4bbl In the works: Addco/Hellwig sway bars, nitrous, full polly bushings, full exhaust, data logging, billet UD pulleys