Another engine that has had a lot of Stocker success, thru the years, is the 455HO. Brad Burton has run one for years. Went a little too quick at one race, not too long ago and got a horsepower hit from NHRA. The '72 455HO with RA now has a factor 352hp, in a Bird.
http://www.classracerinfo.com/Engine...0&MAKE=Pontiac
But, the non ram air version appears to have a 330hp factor as of 1/1/18. So, I would assume Brad is now running the non-RA set-up. Maybe Norman Warling will see this & let us know. Anybody else know ?
http://www.classracerinfo.com/Engine...9&MAKE=Pontiac
Scott Underhill held the E/SA national record for a while, with his 455HO T-37.
http://www.classracerinfo.com/Engine...0&MAKE=Pontiac
One of the first 455HO Stockers I can remember reading about was the Tons-a-Fun '72 Wagon. It was built by Gary Wood. His wife Charlene drove it some. They actually had 2 of 'em. One had a reg '72 Lemans front. The other had the GTO type front. There is some info about these cars at the bottom of the page, in this article.
http://www.hotrod.com/articles/0212hpp-pontiac-history/
Not real sure who else is still running a 455HO in Stock. Larry Maxwell was running a '72 Lemans. But this year he has been running a '68 Bird GT car. A '72 recently showed up at a big race. It was listed with a female driver from Canada. Don't know if that's Larry's old car or not. Can anybody name some other 455HO Stockers currently running.