Disc brake conversion

You can add a booster if you have the vacuum to run it. Some say you don't need it and other like power brakes. Going from 5x4 to 5x4.5 with factory spindles will widen your front track ~3/8" per side so keep that in mind with shopping for tires and wheels. For the rear folks have reused the small 5x4 stuff and redrilled the drum, but I think that is only if you re drill the 5x4 axles, which I don't recommend. I don't think there is a 5x4.5 drum that will work without a backing plate and proper 5x4.5 axle change, which also will widen the rear track.

What is the car this is going on?