Dirt track vent..

It is happening because of GM pumping kickbacks to these tracks. No ****. I was building Mopar 360s for a local kid for the last few years. He ran chubbys forever. He even got sick of the crate madness. They allow that engine in the B-mod and stock car classes. USRA sanction. He could compete with the Mopar engine. Had a couple wins. Probably could've had more, but, he was pretty conservative driving. Didn't want to tear his **** up. The B-mod class open engine rules are what you speak of hear.