This is original head from a 1986 Corvette you can tell by the diamonds  on the head

I took good pictures of the date clock and the casting numbers

Was a TPI motor . 

I still head the motor as well 

One head was stolen at the machine shop

So I only have this one 

The Corvette only had 65,000 original miles but the owner of the car was so mad over the head being stolen you gave up on the project