[jjones752]

Bobby,
I have a Doemelt as well and I've been told that a Bailey setup works. I think you're right in assuming 875's are too stiff, and 750/725 may put you in the ballpark. I'd have to check my setup sheet to be sure and I'm not at home right now, but I think that's what I've gone with and it seems to be working for me so far, using Bailey torsion arms. I'm running strictly non-wing so is you're running a wing your results may vary.
Another option would be to try what you've got and if it feels too stiff adjust from there. Dad has a point too; if you don't know how old the bars are I'd highly recommend getting them dynoed. Also, how the front end reacts is somewhat dependent on how the rear is set up too...