Ohio Cranks 4.1″ for smallblocks?

I've been searching around the web as well as this forum and I can't find too much information about Ohio Crank's 4.1" cranks, and their "425" kit.
If I go with the .030 over it'd only be a 418 but whatever.

I was able to find some info on their BB cranks but not much on the SB, and practically nothing on the 4.1".

Has anyone used this rotating assembly or know anyone who has? (http://www.ohiocrank.com/mopar_rotate.html)

I read good things about their other products so I'm expecting this to be as well
Author: lxrubin