As far as the complexity of changing the headgasket is concerned it's not that hard.
It's just a very involved process because you have to remove some many parts to get to it. If you've never done it before, it may take a while.
Also, if you're like me and like to torque things down to factory spec you'll obviously need to get a hold of a Factory Service Manual.
In fact, get one anyway, because it'll walk you through the process step by step.
Oh, and as long as you aren't generating crazy amounts of boost a stock head gasket will work fine.
For what it's worth I just changed my hg a few weeks ago. I replaced the stocker with a Cometic gasket and changed over to ARP headstuds. Honestly, I haven't had a problem so far, but I guess it's a little early to tell.
One last thing, take the engine out if you can. It might take a little bit of extra time but it's saves you a lot of frustration and downright anger that's generated when you work in tight, restricted spaces. Plus it allows you to better inspect the engine to see if anything else is going on.
Obviously, once the engine is out, replace/install anything that's hard to do with the engine in.
Oh yeah, don't drop anything, like say, a head bolt washer, down the timing chain area. Just don't...
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