The crank from a 260c sedan is better for us, Nissan never bothered much with drilling lots of nasty holes in them
'cos the older folk that was the 260 c market didn' rev their engines past 5000
Less drilled holes = less stress risers= less breakage = easy to knife edge and lighten.
It does have a casting number, but I can't tell you.
( it is inside something!!)
