Just finished mine today. There are dowels on the cover for alignment and definitely use some rtv at the pan its just two small bolts at the front that go into the cover. Only issue i had is that one bolt that goes into the water jacket as soon as i pulled it it dumped a little coolant into my pan i changed the oil right after and flushed through a couple quarts of cheap oil till it came out clean. Seems good to go now just watching to make sure nothing leaks! And id definatley say do the chain at your mileage mine had some pretty bad slop in it at 150,000 so I'm sure yours is pretty lose!
New DD-2009 Ford Mustang GT/CS candy apple red.
(sold)2003 XLT Tan 3.0L V6 5-speed, Lots of mods.