318 industrial?

Forged cranks have wide flash marks (1/2 to 3/4), where cast cranks have narrow flash marks (1/8 ). Sorry I don't have a picture of the flash marks on a crank, maybe some one else has.
Below I have listed crank casting no.s below. You will notice there is not a Forged crank 318 listed. I guess because they were rare. If you have a casting no. on that crack maybe you could post it. Or if any one has any corrections let me know. I think I got these fom an old direct connection manual. :thumblef:


Year......CID.......Crank Type.Casting Number.Bolt Pattern
65-68....273.......Forged......1947235...........Offset
69-71....318.......Cast.........2951673...........Offset
72-73....318.......Cast.........3614369...........Symmetrical
74-80....318.......Cast.........4095633...........Symmetrical
68-71....340.......Forged......2951673...........Offset
72.........340.......Forged......3614369...........Symmetrical
72-73....340.......Cast.........3751160...........Symmetrical
71.........360.......Cast.........3512972...........Offset
72.........360.......Cast.........3614370...........Symmetrical
73-77....360.......Cast.........3751808...........Symmetrical
78-80....360.......Cast.........4173447...........Symmetrical
78-80....360.......Cast.........4095632...........Symmetrical