Yes, supposedly only 4 speed cars and cars with A/C, but I have two 350 A/T cars without air that had them. So not always a rhyme or reason. And yes, the 7's and 8's are narrower than the '69's.
X2. My 350 coupe with 2bbl and 2sp powerglide came with it And my 400HO with TH400 came with it.
Engine Test Stand Playlist: https://www.youtube.com/playlist?list=PLwoxyUwptUcdqEb-o2ArqyiUaHW0G_C88 restoring my 1968 Firebird 400 HO convertible (Firedawg) 1965 Pontiac Catalina Safari Wagon 389 TriPower (Catwagon) 1999 JD AWS LX Lawn tractor 17hp (my daily driver) 2006 Sequoia 2017 Murano (wife's car) 202? Electric car 203? 68 Firebird /w electric engine 2007 Bayliner 175 runabout /w 3.0L Mercuiser__________________________________________________________
