50-55 years ago when I was racing MX my Bultaco or Jawa ran Champs and Klotz for the win. Had a cousin that said Champs burnt a hole in the piston of his go-cart when we tore it down the spark plug was supposed to have a comp ring and it was missing would have thought comp would have blown by but it didn't. Aaaaaand if you had run ACs in the first place in your Chev you wouldn't have had to run that Ford stuff. That's almost sacrilege to a poor little Small Block.