Not sure what the labor rates are where you live but $90/hr is pretty normal around here in NorCal. I figure 4 hours min. is book time to remove all components, check them for wear, install pinion, carrier, and axle bearings, reset R&P, seals/gaskets, refill with Redline. Assrape is a little strong but opinions are like that. You're saying you can get the same labor for $150...where? Hucklebuck Motors or something? You can't even get a mechanic out here to run codes for less than $110. I checked with Rubicon and they wanted even more for the same work. I figure with 225K miles it's good insurance even though the price might seem high to most of you. Assraping is paying a shop $2200 for a clutch job on a 944 when parts are only $600-$700 or $490 to make 4-laser cut keys on an Infiniti Q45 because some maggot stole them during a break-in and left the car in the garage.
Again, any recommendations on a reputable clutch kit?