Cylinder head numbers

3986388 it appears between the 2 and 4 cylinders on the pass. side head. Where else to look for numbers and what could these be? Also the number is upside down from standing outside the car so it could be 8836893. Is there a good website to decode head numbers?

 

Assuming it is a chebbie here ya go


http://chevymania.com/

 

You can do Google search . " 3986388 casting " and a ton of stuff comes up.

 

That link posted above is a great one too.

 

Perfect!! Thanks, I'll bookmark that for future reference.