First thing I would do is see how much ridge you have in the top of each cylinder. Take some fine emery cloth and gently clean the carbon and soot of the top of the bore, then you can tell how if you have a ridge worn. If its noticeable with your finger nail chances are you are going to find its time to bore it oversize, you will have more wear down in the center of the bore than at the top. You should find a ridge reamer to cut the ridge out before you take the pistons out. Then drop the pan and make sure that the rod caps are numbered, if not mark the cap and rod on the parting line. I usually do them all on the cam side. You can take the cap off each one and use some plastigauage to see what kind of clearance you have. If the bearings are scuffed up or you can see a tint of copper don't waste the time to check clearance because you need new ones at a minimum. When you take the lifters out make sure you keep them in order incase you are going to re use them. Then you can take the cam out, the cam gear has a hole so you can go through with a socket and take out the 2 bolts that hold the cam retainer to the block. When you get the cam out of the block take a good look at the lobes for damage or lobes that are worn off. I should mention take your time when taking the cam out so you don't drag it over the cam bearings and chew them up. I would take the valves out of the head for a look. Back when these were driven daily having a valve job done was considered normal maintenance. No matter what I would have the valves ground and the seats touched up with a stone. The guy grinding the seats will or should know about having a nice narrow contact and can also adjust the contact to the center of the valve by back cutting the seat. Lots of stuff, but take things one step at a time and everyone here will help you along the way. Take lots of pictures for reference.