Anybody running 17" Cobra Bullit rims on a Duster
Clair, I have a kit that is a 13 inch upgrade just for guys like you who have already invested in the earlier calipers. Basically just new hubs, 13 inch rotors and caliper brackets. You don't even need to bleed the brakes.
Now one issue is that the new kit moves the hub face outboard a bit so that people can run the 17x8 Mustang rims with 5.72 backspace. Since you're already running those rims without any clearance problems tells me that on your car, my kit might move the rims too far outboard. I can't explain why that is the case but it seems like it would be. On your car you might need 6 inches or maybe even a little more of backspace.
Here is a picture of the 13 inch rotors with the early calipers.