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Aligning My Mustang, What do I need

Actually this is why it is important to pick the correct width and offset rims and tire. This is something almost no one thinks about when choosing rims, but I do.;)
Actually, when I was racing, it was discussed all the time. On some cars, aka Miata's, it wasn't worth increasing the scrub angle to fit more offset in most cases. Within reason, most old school American muscle cars can use all the tread width they can get! Most cars fell in-between. Everything in life has a trade off.
 
I've done my own. It's not terribly hard after you get the essential information on how shim thickness relates to caster or camber along with the tie rod adjusting sleeves. The Ford shop manual has an excellent chapter on doing it.

Anyway I bought a Longeacre magnetic spindle mount. What is really,really nice is the gauge has a 140* angle which gives you the two 20* angles needed. This greatly simplies the process because you don't have to lay all this out on the garage floor and then try to roll the car into the right spot instead you use a long straight edge or string to get the front wheel straight in line with the rear wheel. Then you strike a line on the floor parallel to the front tire a few inches out. You can use a piece of 1X6 wood or what ever. I use folded up 3 mil plastic bags folded up under the tires as slip sheets. This makes it very easy to turn the wheels and allows the suspension to unload and not bind up. Now with the gauge on you turn the wheel and sight the edge of the gauge to the line you drew on the floor.

If you have steel wheels I recommend going off the spindle. I found steel wheels don't run very true. If you have machined aluminum wheels either a gauge that mounts to the wheel or spindle is fine
 
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