[Al Weyman]

Can anyone explain to me how the 2nd Gen big block all aluminum engined Camaro raced by Frank Gardener was ever remotely legal? They never even made such a car at least not properly, they stuffed a few engines in the chassis (about 50 odd) in a none GM garage workshop only sold about 20 odd of these and broke the others for the engines to race in CanAm cars so how were they ever homologated for circuit racing as i believe the original homologation was for the drag strip, I'm confused??