Thanks for posting the article. I read this magazine too and saw it. I was pleased to see the BOP axles get some print space. I do feel compelled to point out one detail in that article that may mislead some people. On the 3rd column of the 1st page, it lists the Buicks as having the BOP axle form 64-71. In reality, Buick purchased all the A-body rears from Pontiac from 64-67. Most of the 64-66 Buick cars I have worked on even had "Pont" stamped on the upper rear control arms. In 68, Buick designed their own rear that is very similar to the Pontiac rear, but very little interchanges--this is the rear that has different size bearings on each side of the carrier, has a larger big pinion bearing, and uses 7/16" bolts to hold the ring gear to the carrier (pontiac rear used 3/8" bolts).
I hope this helps keep down confusion amongst the Buick folks.