I don't know personally but 197's sounds far too long, even for 4cross lace (7x to high flange)
I think the difference in spoke length on the rear hub is due to the hubs you're using normally being fitted to a bike with multi speed free wheel, therefore giving more spacing on the drive side to allow for that.
I'd try lacing them 3cross with 184's and see what happens
![Undecided :-\](http://www.radbmx.co.uk/forum/Smileys/smilies/undecided.gif)
Probably no help but somebody had to say something, good luck
![daumenhoch :daumenhoch:](http://www.radbmx.co.uk/forum/Smileys/smilies/daumenhoch.gif)