Bob,
What price your life?
The set of factory belts I had installed back about 8 years ago cost more than this for the set; I believe the price was something on order of $200 (+/-) for each set.
My own personal opinion is not to try and become a safety engineer for the sake of saving money. Go with a proven installation that someone else has already done, using accepted mounted points and a known belt set. Put another way, try not to create an installation using just a set of belts you may have obtained at a discounted price.
At the time of my install, I had not seen anything; I had only heard of the factory bulletin on the subject and that's what I went with. Since then some restorers have thought this either inelegant or too expensive and have devised other solutions, but there are enough various solutions out there that one does not need to reinvent the wheel so to speak. Just my opinion.
