9in drum brakes
The switch from 9 to 10 inch drums is so easy and then parts are easier to get. 10 inch drums have bigger spindles and bearings and I have never seen a failure with proper maintenance in 50 years. There are even whole performance brake rebuild kits for the 10 inch drum brakes which are a significant improvement. So many people here are switching to factory or aftermarket discs you can probably get the whole set up cheap in one piece!
Even if you decide to go to discs later there are aftermarket kits that use the 10 inch drum spindle.