Reply to "Big bearing front spindles?"

I also feel that the standard rear brakes on the Pantera are inadequate.
They would be just fine for a front engine car.
But a mid mount layout like the Pantera transfers less weight to the front during heavy braking.
So you can fit larger rear brakes to the Pantera & get the car to pull up quicker.
This is because the Pantera sits flatter during heavy braking.
I think the first thing to do is throw the original Pantera brake proportioning valves in the bin.
They are designed to control hydraulic brake pressure front to rear & hydraulic pressure between the two front wheels.
The Front one restricts total brake force just from being there; you may loose something like 10% of total brake force through this valve.

I upgraded my rear brakes to 12” vented Wilwood rotors with 4 piston Wilwood calipers.
Made custom caliper mounts to adapt the calipers to the original uprights.
Then fitted a Wilwood master cylinder with a bigger 1 1/8” bore to gain more volume to supply those larger rear calipers.
Because of the larger master cylinder the pedal will be harder, so I fitted a dual diaphragm 8” brake booster to give more vacuum advantage.
Then fitted an adjustable lever type Tilton proportioning valve in the rear brake line.
All brake hoses are 1/8” stainless braided.
During testing I would do emergency stops from around 80 kph, (50 mph).
The rears were locking first, so I dialed out the rears one click at a time on the proportioning valve until I just had the front brakes locking before the rears.
Brakes are much better with the limitation being the capability of the 15” tyres.

Regards,
Tony.