440 Block what year?

[joe34]

Have a 440 block would like to know what year it might be. ?
Left side block casting # 2536430-9
Top machined pad right side of distributor, view from front of engine #F440 then a 6 over from that #
then a C in the middle of pad, and at the bottom #11 4 2
Any help Thanks.

 

[Pops1967GTX]

1970=F

http://www.moparengineswest.com/Stampings.htm

 

[joe34]

Thanks for the help.
Pops1967 GTX

 

[Mark B]

The casting date for the block is also on the side of it.