Help crankshaft casting number

[RDC5]

Hi all.. I found someone with a steel 440 crank that has this casting number. Can anyone tell me what its out of? I'm looking for a correct crank for my 71 v-code 440.
Thanks

 

[MoparLeo]

66-78 440 forged #2206160

 

[wyrmrider]

only real difference is 6 pack or not