1cm

[Beater]

Originally Posted by 56markII

Since I have a Canadian 1950 Mercury and not a Monarch (yet) 1949 and 50 Canadian Mercury in both the Mercury and Monarch flavors had heads with C8CM with Made In Canuckastan casted directly below. In 1951 our heads had C1CM and the same casted comment below made in Canuck
American 1949-50 had 8CM and 1951 1CM and I suppose I have an American 1951 core in my hoard as it has 1CM on the heads.
My transmission also being a Canadian Borg Warner with OD has the same part number as the American parts manual BUT has a C in front of the part or casting number.
The additional C in the model and part number indicates Canadian or perhaps Complicated
Oh and our trucks also had 8RT heads, both in Ford and Mercury trucks. I have seen a number of them over the years as well. Who the heck knows about the Mercury and 255 but anything is possible? My father used to have a 1952 Mercury M7 3 ton and it is unknown to me what it had under the hood because he sold it over 40 years ago. In the owners manual I was surprised with the engine options! The flathead V8 of course, a 317.5 Lincoln engine and this was the same year it was offered in Lincoln replacing the 337 flathead and to my surprise a Diesel engine as well, possibly a Detroit??
I will dig around and see if I still have the manual which would be hard to find now being a Canadian Mercury truck.

One thing is for sure is the Meteors in the same time period and up to 1954 had the 255 in them quite often. I had a 1954 Meteor and it had the 255.

i actually have a 51 merc M7 with the 317 in it