8RT engine differences

[skidmarks]

I got this motor a few years ago and got it out to put in a truck.

I noticed that it has 3 oil ports and made in Canada on the heads. It does have a number stamped in the intake rail but didnt write it down.

Anything different about this engine compared to any of the other 49 to 53 ford and merc motors?

Compared to a 53 car motor that was sitting next to it, the end of the crank flange was drilled on the car motor and not on this truck motor. Is that for automatic transmissions?