These are 45 cubic inch flathead cylinderheads. They are aluminum
heads.
The spark plug hole in the front is in decent shape and plug hole in
the rear
needs repair. The front measured 64cc's and the rear measured 68 cc's.
I believe that these were on the same motor at one time. It looks to me
like
the owner wasn't too good with a plug wrench as the fins around the
front
hole are broken and the hole in the rear has been stripped out and
mangled.
The gasket surface is flat. I don't see any cracks other than fins. The
rear
had a little clearance added for the valves. At one point in its life,
the front
was chromed. All in all there not too
bad and are pretty much an easier fix
as compared to somethings.