Brake Reaction Rod Help

[CTX-SLPR]

Howdy,

So the front suspension of my '64 Riviera uses a single lower control arm and a brake reaction rod. Since the front of this rod is anchored in a big rubber bushing that the modern replacements doesn't seem to holdup and the rubber is squishy, I'm thinking of replacing it with a spherical bearing. This is not without precedent, reading up on Trans-Am mustangs mention uni-ball conversions on their similar rods but this car is 4000lbs dry so the weight is higher. I'm leery of using a heim because it would move the pivot point rearwards and outwards. The rod is somewhere between 3/4 and 1in diameter and I would bolt it through the bearing.

Two questions:
1. Is moving the pivot point a worry? I'd have to measure the angle to know how much out of plane it would be from the control arm pivot. Seems to me it would cause negative caster gain which I doubt is a good thing.
2. How much load goes on that joint since spherical bearings are only 20% of radial strength in axial. Likewise for compression vs. tension since most of the shepherical bearing holders use snap rings on one side. Was thinking radial load >10x the vehicle weight would be sufficient.

Thanks,