I've been curious about the chamber size of the 239 heads for a while. It looked like the cast in scalloped shroud around the valves might give the heads a smaller than expected chamber volume.
Finally got around to cc'ing one of the heads. 76cc! Ouch. That would give the little Y a whopping 6.75:1 compression!
Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.
