+1 on the Ignitor, I installed one on my Mustang and the 400 in Buick. I also went with a Mallory Dist. in the Mustang to get rid of the vacuum advance. I can look up the part if you want, I know exactly where the box is because it has the original dist. in it.
You got more done on the brakes on yours than I have on mine in 9 years... I have the back done with the set up from an 86 SVO Mustang. My son who is (9 coincidently) has been asking for me to get the 66 down and finish so we can drive it again.
Here is a the rear before I installed it in the Mustang. The wheels are American Racing Torque Thrusts in 16x9 and just a hair too big. I need some 16x8's I think.