The Ford Barn - View Single Post

rotorwrench · 06-28-2019, 06:10 PM

The "C" in the prefix designates Canadian. The 3rd oil pressure port started as a Canadian thing for the Universal Carriers they were building even before the war started. Canada kept building the 81A engines pretty much the same before and during the war as far as I know. They didn't have time to do some of the changes that were done here in the US.

The 81A heads were decent enough and have a good compression ratio as long as they haven't been shaved too much. Like any 3 1/16" bore block, they have limitations on how far they can go oversize. There is likely someone out there that needs one for a prewar car or pickup. Most folks hesitate to purchase one that has already been overhauled if they like to do that stuff themselves but there are likely enough folks that wouldn't care out there in resto land.

06-28-2019, 06:10 PM	#8
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,422	Re: Update NOS WWII Engine The "C" in the prefix designates Canadian. The 3rd oil pressure port started as a Canadian thing for the Universal Carriers they were building even before the war started. Canada kept building the 81A engines pretty much the same before and during the war as far as I know. They didn't have time to do some of the changes that were done here in the US. The 81A heads were decent enough and have a good compression ratio as long as they haven't been shaved too much. Like any 3 1/16" bore block, they have limitations on how far they can go oversize. There is likely someone out there that needs one for a prewar car or pickup. Most folks hesitate to purchase one that has already been overhauled if they like to do that stuff themselves but there are likely enough folks that wouldn't care out there in resto land.