After much consideration, I've decided to use the kit from Scarebird to convert to front disks. All the tapered roller bearings used in this conversion cost less than a new inner ball bearing in the old setup. Additionally, the conversion does away with all of the potential causes of my issue except the spindle, which I'm also replacing. I should end up with a better stopping truck.
Scarebird sells you the new brackets and hardware and gives you a list of the NAPA part numbers where you can buy the rotors, calipers, and the bearings, etc. you can get either the 6 lug rotors or 5 lug. It is a "Frankenstein" assortment of parts for sure, but it works from what I've been able to find.
The total hardware cost is around $600+-. I previously converted to a dual master cylinder which may further simplify the project. I have questions about whether the dual master cylinder obviates the need for a proportioning valve or if I need some sort of pressure limiting device on the front line. I do not plan to use any sort of booster.
I'm running 60-61 GM 6 lug 15x5.5" wheels, so it also remains to be seen whether I'll need to grind on the rotors for clearance. I would appreciate hearing from anyone who has done this kit as to anything to watch out for. I'll post my experience with this.
