Twin plug heads

Not mine...

I shared a number of emails asking about these heads and the seller went to great lengths to measure the ports and valves for me. They are 1965 heads, but from his measurements look like they have light porting work and larger exhaust valves. Here are the measurements he gave me:

intake port - 33mm
exhaust port - 33mm
intake valve - 39mm
exhaust valve - 38mm

He also said that they used to be on a 2.5, so they may have a different volume than standard 2.0 heads.
Pretty cool stuff!

http://i22.ebayimg.com/03/i/04/b3/1e/76_1_b.JPG