Speedway has tons of stuff for the 9"

9 Inch Ford Pro Ring & Pinion Gears

They go from 3.5 up to 6.5 gear ratio for around $150

I just put rear disc brakes on my 8 inch for less then 1/2 what you would pay for some of the kits out there. They would also work on 9 inch with the small bearing - just ask if you want more info.