Purchased a 66 Chevelle that is started towards a rebuild.
It came with a 355 but the previous owner lost all the paperwork to what was in it...he was not the person that put the engine in the car.
He claimed it had expensive heads (and all new everything).
Can you help me identify what heads I have or what site I can find out?
It looks to be some roller rocker with the valve cover bolts in the center of the cover.

The numbers I found on the front of them are:
4227
0403-007C

Here is a pic (yeah it is a bit dirty from the 1000 mile home trip) :
http://img.photobucket.com/albums/v626/rothjm/IMG_0619.jpg

You might want to pull a valve cover for some more info for us. They look like cast iron World Products. The newer World heads come with center valve cover bolt option.

Dave