I have a 62 Mercury with 2 speed Fordomatic water cooled.  I'm wondering which cooling version was better, and if an air cooled Fordo would fit up to the SBF, as there is a '55 3 speed unit on hand.

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.