This is something I just found out! Chevrolet was involved in making this head for the Model T!
Norm
> http://www.nwvs.org/Technical/Frontenac1923Catalog.pdf
The Chevrolet brothers were involved in more T speed equipment then just the head. They knew a good thing and how to capitalize on it.
A little further research will show that they had very little to do with the Chevrolet car company. It ended up being pretty much a name only deal.