Noonan, If you knew the amount of time I have invested in making this kit work for these big old trucks you might understand that I am not making very much money on these kits. I have had a couple of guys run my master bracket with the modern dual circuit vacuum boosted master with success. I have not personally driven a drum brake truck with that set up, but As I understand, it works well.
On the kits, I am about a week away from having 5 kits put together for sale.