Case half  of my '63 102hp engine, after cleaning, but before painting.

Inside the same case half.

End Cover per William Wynne's manual

Head from my '65 110hp engine.

Combustion chamber of my '65 110hp engine, after cleaning, but before porting.

The rocker arm side of the same head.

Here's the head identification number.

....and here's another view.

Crank with safety shaft installed.

This is the crank identification number.  8409 is the one you want.
It was used in all the late 2700cc engines.

Here's the case identification number.

Here's a closer look at the case code.  It's the t letter suffix that tells you if it's early or late.  The HP related to the suffix is basically unimportant,  as the head is what dictates the HP.  The same early case can be used with low compression smog heads,  110 heads,  140 heads and even the 180 turbo heads.  It's the combination of the case code and the head code which truly identifies the engine.

Early cases have a smaller displacement than the later later cases.  This was achieved through stroke.  On the left is a late connecting rod from a 1965 110hp engine.  On the right is the rod from a 1963 102hp engine.

Another view of the con-rods.