We now know…

B3422w5 said
Charlie Westcott came to the rescue . Comella said in an interview they wouldnt have been able to race because they couldn’t fix it.

The thing I didn’t hear was if he’s running iron or aluminum heads.

If they were aluminum I suspect they would have done a weld repair and not the set screw but maybe not.

If they were iron heads then that’s even more impressive because those things on their best day are egg shells.