9" vs 10" drum brake spindle question

RE your original question:

Regardless of which kit you get, you will need to upgrade to a later dual reservoir disc brake master cylinder, proportioning valve, and MC line kit. If you have power brakes, you MAY also want to consider upgrading the booster if you choose to stay with PB.
The good Doctor has all the parts.
Actually, on this car I want to get rid of the power brakes and go with manual. I am planning on getting the dual master cylinder. When I think about it, it's kind of crazy that cars used to be made with just a single chamber MC.