I bought the 91000/91100 kit, and used them on two of my vehicles - my 65 Mustang and my '79 RV. They worked really well for me! Considering how difficult it is to find someone who is knowledgeable on aligning the front end of a '65 Mustang (I live in rural Arizona), it was money well spent. I found mine on eBay, and didn't pay that much for the FasTrax system.
Wow, $150 for a specialized tool or $59 to pay somebody else to do it... guess which option I chose?
I makes great sense to do your own alignment.
A lot of us have larger wheels and tires and fancy A$$ suspensions.
The data that is in the alignment machines is the spec from the 60's shop manuals
which have nothing to do with wider wheel and tires and front end and rear end drops.
I've had the cars on the state of the art machines and to get the wheels where I want them the machine is always in the red zone.
The magnetic caster/camber gauges are great, but if you can't get them seated on the hub because of your wheel style, or want to check rear camber you'll need the wheel attachment with the 3 or 4 pins (which DO leave marks on your wheels) or a similar adapter with non marking clamps. These adapters must be adjusted to compensate for runout each time you use them. The best toe gauges I ever used were optical projection types. I just quickly perused eBay... there were some decent buys in used gauges.
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