I went through this a couple of years ago with my dad's 92 sable wagon 3.8.
Off the top of my head (no pun intended) the most specialized tool that
comes to mind is the power steering pump pulley puller-installer. Other
than that, its fairly straight forward albeit agonizing. Expect to break
some intake manifold bolts, and be absolutely sure to have the heads checked
by a competent machinist familiar with the 3.8's problem areas (I had both
heads planed). The fun part is the bolts on the firewall side head, be very
careful not to cock the socket on the head bolt like I did and round it off
slightly, no room for a drill. Luckily I tried those (what originally
laughed at as goofy) metrinch sockets which did the trick. Other than that,
you must have a shop manual, I suspect you already knew this and just wanted
the surprises or noteworthy aspects of doing the job. One more thing, if I
recall correctly, my machinist said to get the hi-temp head gaskets as they
were more durable, can't remember what brand.....
Good luck, and if you have any questions as you get into this, feel free to
post and if I see them I will try to help as best as I can.
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