The last six digits of that number are all numbers, not letters. The first two are probably "8*", I was just looking at a block that had that prefix before the six digit number. The six digit number is the consecutive serial number of the car that the engine came in. Could it be 214718? See if you can discern those numbers a little better, maybe some paint on them and then sand off the flat part, see what's left.
I will look in my SAAC registry and see if I can find a number ending in 718.