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A head gasket is not a small task. You may be up for it. I 2nd checking on youtube. Even if you do not find the same vehicle, watch a video of a similar repair to get an idea. Check out ALLDATADIY.com for technical repair manuals by vehicle. It cost $29 per year but will be worth it for this repair.
Not to sound like an a..hole ,but....
Head gasket replacement on 4.0 is not as easy as on other motors. Would you do just one side ? Which one ?
You will need to redo the timing and I am not an expert on the 4.0s but you may need to pull the engine out if doing the passenger side.
Hope others will chime in, but besides the torqe specs, new head bolts, you would also need to clean and resurface ??? the heads and block.