Those are killer, Bruce.
I went to many BGN races in those years and was standing in the 2nd turn at Bristol when Mikey crashed. Unbelievable !!
Also, not to correct, but the V-6 were limited to 274 Cu In. They "could" run a V-8, but they were limited to 311 Cu In.
The V-8 cars also had to weigh 3300 lbs, 100 more than the V-6s.
Good memories, from when it was fun...............