Well after many weeks of research I finally pulled the trigger and converted to rear disc brakes. I used the 13"dual caliper setup from a 2001 Tahoe. Took about 3 hours to complete and overall was a huge improvement. I didn't changemaster cylinder, booster, porpotioning valve, or abs module. Just the rear brakes and emergency brake cables. I will post pictures tonight and a full parts list for the conversion. I have less than $500 in mine. Seems every post about this conversion turns into a disc versus drums argument so I wanted to post that it can be done, its relatively cheap, it doesnt freak out the ebcm or abs, and it does improve the braking of the nnbs. Yes I went backwards by using the gmt800 emergency brake setup but that wasn't a priority to me.