Well, if the SS/AM class is NOT included, I still say that J.B. & John Clegg's SD455 stick cars are the quickest. They've run both the '73 that John bought new, and the '74, that's supposed to be the old H-O car. They restored the '73 a while back to make the '18 US Nats. Don't know if they used the engine out of the '74, or built a new one.
Here again is a link to a race where J.B. ran back-to-back 9.62's, in SS/I trim. Don't know of a reg Pontiac SS car that's gone quicker.
https://www.dragracecentral.com/DRCS...UMMIT#indextop
The old '69 RAIV Angeles & McCarthy Bird that Keri still drives, ran high 9's. But, I don't know of another reg SS Pontiac that will get as deep into the 9's as the Cleggs' cars. And, they switched over to GT, with the '69 Bird. So, it's not in the running here.
If there is one, or some, quicker than the Cleggs' SD455 Birds, I'd like to know about 'em.
With all the Pontiac stockers that can now run real low 10's, I've often wondered how much quicker they'd be, with SS mods added. For example: Scott Burton's '70 RAIV Bird Stocker ran some 10-teens, & even a 9.98 at a bracket race. So, how much quicker could it be as a big tire, 1st class SS car ? Couldn't you likely gain more than half a sec, with all the SS upgrades ?
Seems to me that Bill Rink gained closer to a sec, when he switched his '74 GTO over to SS. But, I suppose the small cam, low compression engines can gain more, when switching. I'm sure that some of you guys know how it works.