With that mileage you better pull the pan and push em out and do rings, bearings, all the seals on the front, the distributor seal from kbox.ca and just make a day of it, it is a easy car to work on and the cams will have to come out to get the head bolts out, notice that you will have to put a little bolt in the one cam gear that has the backlash spring gear on it to hold the spring, The block will be ok, just scuff the walls a little and new pistons will go along ways to a quiet motor since the 3s is known for piston slap and get good ones, pull the head with the intake on it