front disk brake conversion kit

There is nothing you'll accept. You believe your kludge is better, and NOTHING will change your mind.

Maybe it really is time to require any vehicle with altered suspension geometry be tested and signed off on by an engineer before permitting it on public roads.

So no evidence or data to back up your opinions then? Just handwaving and name calling. Just like Ehrenberg. You want to change my mind? Provide suspension plots backing up your position, like Bill Reilly did and Ehrenberg never has.

The mistake all you purist types make is picking one piece of factory engineering and ignoring others. Like, the entire suspension system was designed around bias ply tires. The torsion bar spring rates, the factory alignment settings, heck even the ride height (because of how it changes camber gain).

Slap on a set of radial tires and all the factory suspension settings go out the window. Better traction means the factory torsion bar rates are too low. The factory alignment settings are for bias plys, radials need more positive caster and tolerate negative camber better because of their construction. Oh, and negative camber gain works better for radials. So, lowering the car to improve camber gain results in even better handling. And what do the taller spindles add again?

Even Ehrenberg admits some of that, just look at where the SKOSH chart came from. Even he knows better than to run bias ply factory alignment numbers.

Suspension is a system. Change one component and everything is effected. Unless you run bias ply’s the reality is you’re not running the factory settings. The factory engineers would have changed the factory geometry and settings if these cars had come with radials from the factory. You know, exactly like they did when radials became standard?

Requiring an inspection is a bad idea, but I’d welcome it. My altered suspension geometry works far better with my modern radial tires than the factory geometry would. Just like the factory geometry works better with bias plys than my alterered geometry would. It’s physics.