what is ford 8cy engine

8CM is Merc from 49 thru early 51. Some Canadian Manufactured stuff has C included in part numbers but the Y in there is a mystery to me.
 
Sorry I should explain.... I was looking at a set of pistons on the e/bay. Seller stated they fit a flathead 8cy .030 over .I never heard of that 8ca befor and just wanted to know what was going on
I saw that too. Never heard of 8CY designation. he alos didn't say if they were 3 1/16 or 3 3/16 +.030.
 
I called, they are 3.1/16 + .030 early ford v8..mistery solved .Great starting price for a set of pistons, to bad they were so small
 
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