Thanks for the replies Mitch! That info is helpful. Yes the car manufacture date is well past that, (5-91), and I'm thinking it has the long nose crank, but there are doubts since there are conflicting things written about some of this. I have the repair history from previous owners going back a long way, and the water pump & timing belt was put on at 87, 200 which was only 32k ago. However, the WP (or perhaps the lower hose to water pump clamp) leaks a dribble every week for a year and a half now. Maybe because it the temp sensor stopped working two winters ago and I blew a small turbo coolant hose. Nothing got hurt, I was two blocks from my destination and I got it towed home for repairs, but it took me a week in sub-zero temps to realize the sensor caused the hose to burst, so it kept getting a little too warm and overheating a little that week. The next weekend I replaced the sensor and t-stat and all has been good ever since, (except the dribble - a teaspoon a week).
Thanks for the info on tapping the holes. I have a metric tap kit, and have done some repairs previously with it, but I welcome more experienced user input! However, I think I'm going to have to go with bigger bolts if that is possible. I tried putting in another 10 in one of the holes and it is not big enough. I can see the threads if I look at it off-center and they are wallered out some from the way it came apart. I looked at the PDF for the engine section of the repair manual and I'm still not sure what is actually threaded, but I think it is the harmonic balancer.
BTW, I went to remove one of the two remaining bolts and with the slightest of pressure, it snapped off halfway down the bolt shaft. I might need a harmonic balancer if the holes are wallered out too much.
Rock Auto has a DMJ timing belt component set which includes everything - even the water pump and seals for $53. I just have to psyche myself to take this on right now. I'm not the mechanic my dad was, I was a bodyman!