how do i tell if my engine is

cosgig said
Under the head on the drivers side, on a flat milled area will be the assembly numbers. You will get limited information from this, but you will be able to determinte the build date, the displacement, and the year. If it's a 65 motor, the year will be stamped "A", if it's a 66 the year will be "B", if it's a 64 I don't think it will have a letter designation. The displacement should be stamped there as 273, and the build date will be the day and month. The casting date on the side of the block will narrow down the year also. This is all provided that it is an 8 cylinder car, if it's a 6, I don't know how to tell. good luck with your project, Geof

The '64 designation is a "V" before the 273 stamping. 6cyl.'s are the same story, they just have the number in a different place. "R" is 1961, "S" is 1962, "T" is 1963. The STAMP codes are on the RF top of the block by the coil mounting area. It doesn't always have the full 225 or 170....but uses 22 or 17 instead. If those have been milled off during a rebuild, it can sometimes be much more difficult. Some of the early blocks have a date CASTING code above the block casting number. Starting in '68 they were to the right of the block casting number. I've seen many with incomplete numbers so good luck there!
Thanks, Mark