True???

It's not even steering geometry....it's that the taller spindle over-angles the ball joints.

Does it work? Yes?

Does it stress the piss out of the ball joints at the extreme ends of compression and extension? You bet.

Having been lucky enough to experience a balljoint failure at parking lot speed and nothing more, I will NEVER run the FMJ or B/R spindles on an A-body. No-way, No-how. NEVER.

Most people don't have an issue because they don't actually hit the limits of suspension travel where the issue is. It might cause an issue on the first hit or the fiftieth, but it's not worth it to me.

For the rest of you, it's your ace, not mine. Mopar Muscle tech sucks balls and is consistently far off base. No thanks.

How do we know ignorance abounds on the issue? Simple! Steering Axis Inclination (according to Mopar Mushle) is increased by a half degree using the "other car" spindles....which would make the car more stable (as MM says), yet people describe "better handling". Sorry, those two are counter to one another. The people claiming better handling are describing something that is not attributable to the spindle swap.