9in coversion to Disk kit.

Let me start by saying, I'm sure this had to be covered somewhere else but I couldn't find it.

I have a 70 Dart /6 with 9in drums in the front. I want to switch to disks, but all the kits say 10in drums to disk conversions. Anyone know of a 9in to disk kit, or what would I need to get for a 10in drum to make the kit work. Is it just the spindles?

Little help would be great, as I have never really worked on a car before, and this is going to be my self-made dream car.

Thank you in advance