That’s how to win races with a less than perfect factory chassis and a small budget. They’ve been doing this kind of thing for years by fabricating new parts, mixing and matching stock parts, modifying suspension/frame mounts etc. For years circle track racers that run stock G or F body chassis have used taller truck upper ball joints, which seated improperly to improve the geometry.
This was the genesis of our pro Touring Tall Spindles for the GM A and G Body and S series Truck platforms. Road race cars like SCCA, TransAm, LaMans Series race cars and fast DRAG CARS use special taller spindles, raising the upper ball joint pivot points like our Stage 1 and 2 packages do. To make any profound improvement in the suspension geometry of cars that need it the actual pivoting points (pickup points) that determine that geometry need to be moved vertically. Our upper arms have this benefit as well as more caster adjustment. As the + caster is increased there is a tiny improvement in camber as a side effect when the wheels are turned. However too much can make the car feel vague and the steering sluggish so that only goes so far. They add + caster which can make the car track straighter at speed and improve turn in. The length and offset of the arms has very little effect on camber change, roll center or overall handling. Changing just the upper A arms can only do so much.
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