big bolt pattern
Ah yes, Ehrenberg’s completely unsupported claim.
It’s bullshit.
Bill Reilly actually checked the geometry and published it. You can see for yourself in the article he wrote,
@Professor Fate posted the version that was on Big Block Dart, or you can read it here.
Swapping Disc-Brake Spindles - Mopar Muscle Magazine
In short, Ehrenberg was completely wrong. The FMJ spindles work great, and arguably better for some set ups. Like mine. I run them on my Duster and my Challenger. Ball joint “overangling” isn’t a real problem with that swap.