426 engine block casting numbers

[cudaguy1]

I have been seaching for info on casting numbers on my 426 block.I know that it it is a 65 to 71 #2468330-1.the other code on the block I need help on,there is N followed by RL under that a clock face pointing to 3 but oddly no casting date below that on either side of the block

[JS27N0B]

How about posting a picture of what you are talking about?  Also how a about a picture of the rear of the block ear where the bellhousing bolts on? There should be the assemblydate there.

You should have D  N with a pointer underneath pointing to Day or Night(when it was cast) clock face poitning to 3 means it was the 3rd casting from that mold. Don't know what the RL means.
There should be a date on the opposite side of the block?