Changing Drum brakes to Disc brakes on a 8000lb fifth wheel?

Very little. I've had my Jordan adjusted so the trailer brakes lead the truck brakes a little bit and that cuts down on the delay. I prefer having a little delay and better brakes than what I had with the drum setup. I only drove it 10 miles to be sure they worked before we go to Socal for Thanksgiving. I will bleed them again before we go, to be sure air isn't a problem. Craig