Can you guys help me figure my 440 out

I have a 440 build date 1-6-71


only numbers I could find are 2 10 424

basic 440 cast number 2536430-5

D N pointed at the d

on clock type points to the 7 oclock position wtih a smaller dot on on the 11 oclock position

Motor is rebuilt but I am just curious

Thanks for any help

Dean

1969 Road Runner Bench seat, four speed 1999 Dodge Ram 1500 http://picasaweb.google.com/moeville