I can answer a few of your questions:
1) Yes, i use Dura Flush, it is a refrigerant flushing solution. I like it better than solvents. The book you have may be before the EPA ruling banning release of refrigerants.
2) Oil has to be added to the inlet of the compressor. After putting in 4ounces of oil into it, you have to turn the shaft by hand or clutch tool to force oil out of the cylinders. Very important. I would recommend Ester 100 if using R134a. Don't use PAG. I think it is too hydroscopic (absorbs moisture easily)
3) You can rent a vacuum pump from a tool rental place or AutoZone in some stores
4) When you weigh in the refrigerant, I put 80 - 85% of the original charge weight in.
5) As far as the bolts go, I would go to a junkyard and get the bolts. Or go to dealership and get the right ones. These bolts are a certain lengh and have to be right or you will distort the case and cause leaks.
6) One more important note. Remember that the oil will absorb moisture from the air rapidly. Once you start, don't stop. I get everything else together first, then add the oil and the accumulator last, then vacuum down.
Don't be scared, you can do it. I have had very good sucess retrofitting my 87 Bonneville to R134a. This car will take the retrofit very well. You will notice a little loss of capacity over R12 when idling in a hot parking lot, but it'* not that bad. Feel free to e-mail me at firstname.lastname@example.org
and I will help you.