Of course, not all '73 Bird Stockers ran the SD455. They could run a 400 or the D-port 455.
In recent years, the only 2 Stockers, running as '73 models, that I can think of, is the car raced by Michael Brand, & the yellow car that was raced by Adam Davis. The yellow car has changed hands.
Both cars have run strong. Michael won his class at Indy, in 2015. Adam was RU in his class. Michael ran 1.010 under. Adam ran 1.048 under. 2 pretty strong Birds.
https://www.dragracecentral.com/DRCS...r2015#indextop
For the 2019 season, as many here know, Michael switched his Bird over to SD455 power. Did a quick check. A 10.77 was the quickest time I saw. The car wasn't as far under as it was with the D-port engine. But, maybe it went quicker than that. Anybody know it's best ET, with the SD455 ?
Here's a re-post of a link to the video of a pass, with the SD455 in it.
https://www.youtube.com/watch?v=yO-04aqNm5I
Michael ran the car as a Formula, which as most here know, could use a T/A hood & shaker, without any spoilers or wheel flares. So, I assume that the only body changes he had to make was to change out the hoods & install the shaker.