I'll take a stab at that.
I don't usually pay any attention to the speed. But as for lowest ET:
Traditional SS is J.B. Clegg's SD455. Close to the mid 9's. Ran a pair of 9.62's at this race.
https://www.dragracecentral.com/DRCS...UMMIT#indextop
Stocker is definitely Scott Burton's '70 Formy, even tho it's no longer in this country. Dipped into the 9's at a T&T, & I think it has run some 10-teens in competition. But, it may take me a while to find a link to those. But I'll be lookin. In the mag article, I think he said he'd run a 10.17 @ 128. Don't think any other Pontiac Stocker has come close to that. Don't know what John Schole ran, when he had the RAIV engine.
http://www.hotrod.com/articles/hppp-...tiac-firebird/
He ran a 10.195 @ 128.89, in class, at Indy 2015.
https://www.dragracecentral.com/DRCS...r2015#indextop
In GT, if a Cobalt body is OK, Robert Cruzen has run some 8's. Turned an 8.900, for a GT/AA class win at Indy.
https://www.dragracecentral.com/DRCS...r2016#indextop
If any are quicker, I'm not aware of it.