Heads Factory Marking Identification Please
 

What are the numbers before and after the Date Code (June 85).

Is K1926R the model?

Also each are punch with a numbers of whole matching its location, is that factory or a rebuild trick?

# 6 look like like it has been sanded for some reason.

There is a missing fin on all of them in line with the spark plug, any reason for that?

Thanks

Cylinder 1 to 6.

http://forums.pelicanparts.com/uploa...1362868762.jpg

http://forums.pelicanparts.com/uploa...1362868788.jpg

http://forums.pelicanparts.com/uploa...1362868829.jpg

http://forums.pelicanparts.com/uploa...1362869173.jpg

http://forums.pelicanparts.com/uploa...1362869202.jpg

http://forums.pelicanparts.com/uploa...1362869265.jpg

http://forums.pelicanparts.com/uploa...1362869301.jpg

FWIW those are the heads, not the cylinders (I'm sure you knew that though). Might help in the ID Kowing this.

Good luck in your search.

Yes not sure why I wrote cylinder... Thanks