Bear with me as this will be long winded. I started MVs with an M725. Alot of the guys on the 715 zone would use a corvette master cyl so they could "upgrade" to a dual circuit system. In a single circuit system, one part failure would result in no brakes. Same with a deuce. One of the guys put rockwell axles under his truck and was unhappy with his brakes. He did some looking and found a 2001 3500 master with hydro-boost worked out great. It has a 1 9/16ths bore. Anyone know what the bore is on a deuce master? Anyway, Could this dual circuit master be put on a deuce and have a second airpack added, so you could have a dual circuit system? I have looked around and not found much info on obtaining a dual circuit system that is made for the deuce.