Today, I picked up a rear end out of an 85 GSL and I want to swap pretty soon. When I add the disc brake rearend I think that I will change my front
to rear brake bias.

How much of a change will this be and what is the easiest way to correct this.

I have a proportioning vale that I can add or I can get the master cyclender from the GSL.

Suggestions? Thanks ~ JEB