At first I found a 12.2 doubtful, But I dug out my time slips. From my first outing at New England drag strip 4/7/74. I was on my 1970 S running B stock class # 16 I have 4 time slips from that day. This is my first time drag racing . So
Race 1 = 13.74 @ 101 mph,, Race 2 =12.95 @ 101 mph,, Race 3= 13.04 @ 102,, Race 4 =12.69 @ 103.32 I did win a trophy and I was hooked. This is before the modern time slips that have all the new info on them like reaction times and different times of shorter distances. I believe the speeds back then were an average of 50' before the finish and 50" after the line. So it payed to keep on the gas after the finish line.
I know, you do not trip your ET light until you break the beam( at least now a days) so a racer with a slower ET can win , If they have a faster reaction time , I think that was the way back then. If you cut a good light, you can gain many tenths right off the bat.
It is interesting that the the bike that did a 12.2 was an Interstate , If It was set up like My MK2a, It had low Euro bars and the big gas tank, that put the weight of the rider over the rear wheel for better traction and the low bars made the bike more stream lined and probably had a 21 or 22 tooth sprocket?? that may have saved a shift into 4th if you ran it up to approx 8,000 rpms in third. There is something very special about those S models that makes they rocket ships. And a factory guy on a mission was the right pilot for the job and a 12.2 was as good as humanly possible, I tip my hat to him!