I agree that when there is an overheating complaint it is often from clogged water gallery passages.

Check out the passages on this 1948 head.

[img]http://www.surfacezero.com/g503/data/3596/2013-07-20_18_43_47.jpg[/img]

Looks like it needs some angioplasty work.


1941 Chevy 1 1/2-ton WW2 4x4 dump truck
In the Stovebolt Gallery
Lots more pictures