ttt...anyone? And with all these views.
You are not going to get, and you
really do not want the front wheels to skid in a panic-stop with stock front brake components, master cylinder, and using larger tires. Skidding tires do not have traction and if you do not have traction, you do not have directional control.
Because of inertia you get weight transfer from the rear of the vehicle to the front, hence why when you do panic-stop, the front suspension will compress slightly while the rear will unload and permit the rear brakes to lock up; disc or drum in the rear does not make a difference.
The stock Toyota proportioning valve located below the master cylinder does a fair job at best of preventing the rear brakes from locking up. I have installed everything new into a 1977 40 series running 33-inch tires; disc front drum rear. The rear drums would still lock up. When backing up fast on a dirt road, the fronts would lock up, but would not ever lock up under a panic-stop going forward.
The above is also true on a 12-82 40 series with the later style rear drum brake configuration as well. At the customer’s request, I backed the brake shoe adjusters off in an attempt to prevent the rear brakes from locking up when aggressively braking. This only proved to provide more pedal travel before locking the rear brakes up.
How about a few more pictures, perhaps a little larger, from a real digital camera that can show some detail of how you have things plumbed, and where things are mounted?
Where is your truck located?
