Re: Buick GSX Video!
 

Not sure, but I thought that none of the Sklark/GS/GSX Cars came with a 12 bolt rear . . . except for a few Skylarks/GSs that were built in Canada. https://www.yenko.net/ubbthreads/imag...lins/dunno.gif

Re: Buick GSX Video!
 

That was a non Stage I car. No chrome valve covers is the dead give away. All GS cars for the U.S. were 10 bolt rear ends. Some Canadian cars came with the 12 bolt.