Front disc brake conversion on Demon-Now alignment is way off. Needing help!

lucahemi said
Hey Guys,

this thread has me worried. I have a 72 demon. I bought an entire disc setup off of a 73 duster with everything. Do I need these Moog offset bushings or not?

Thanks

You don't need them to install the disks, but you will need a new alignment regardless after installing everything you need for the disks.

The point of the offset bushings though is to get you an alignment that works with your radial tires. The stock specs were for bias ply tires, and are WRONG for radials. The FSM calls for negative caster and positive camber. That is a disaster for radials. Radials need slightly negative camber and positive caster. In other words, the opposite of what bias ply's need.

The SKOSH chart is what you want to use. Even it is a little conservative on the amount of positive caster. This is especially true if you have power steering. Without offset bushings it's pretty much impossible to get more than +2.5 to +3 degrees of caster. That's not horrible, and will be fine on these cars for what most people use them for. If you start looking for performance handling, you need more.

So, you don't need offset UCA bushings to install the BBP disks. That doesn't matter at all. You should get offset bushings if you run radial tires though, and that applies to everyone- BBP disks, SBP disks, SBP drums, whatever. If you have radial tires and want them to handle and wear properly, you should consider offset UCA bushings. And if you're rebuilding the suspension, the UCA bushings should be replaced anyway, so you might as well use offset UCA bushings and make getting the proper alignment that much easier.