Probably nobody that cares, but there is some slight misinformation this thread.
First thing I'll say is that I've never heard of anybody running the 326 in a competitive Stocker. The holes are just too small.
But, can anybody here site any competitive 326 powered Stockers ?
The Pontiac 2-speed auto was referred to as a "power-glide". It's my understanding that all the '64-'69 Pontiac A & F-body 2-speed autos were not Chevy Powerglides, but were what some call a "Super Turbine 300". I think these were also used in some Buicks & Olds too. IIRC, they could use a TH350/TH400 type converter.
https://en.wikipedia.org/wiki/Super_Turbine_300
BUT, after '69, SOME Pontiacs did come with a PG trans. I think some of 'em came with a dual pattern case & some came with that same case, but only the BOP holes were drilled.
I only bought one of the dual pattern PG's. Actually bought the whole car(what was left of it) from a U-Pull-It yard. I think it was a '71 Bird. May have been a '70. When I unbolted it from the 350 engine, the bell housing part fell into several pieces.
Couldn't tell it was cracked, because of all the caked on dirt. I only saw one other, which was in a Lemans. I wanna say that they only came in Pontiacs in '70 & '71, but could be wrong.
https://www.ebay.com/itm/293982744520