What is the best crank Nissan made for SR20DET redtop?

[SR20DETpwr]

I remember reading something in this forum or another about what numbers to look for on your crank to see if it was the strongest one that Nissan made. Does anyone know what numbers to look for on the crank that would tell me if I have the strongest one or not - I've looked at it and I found a set of three or four 1's w/ some 0's after them. I almost have all of my parts together to start my motor build, but I'd like to know if I have the strongest crank that Nissan made for my motor or not. Thanks for any helped - I searched and couldn't find the post again.

[jilo860]

im almost completley certian those are for the bearing sizing for the rods, where did you hear about this strength thing? that dosent sound feasible at all