I use a manual 1-1/8" MC from a D150 and it works great. The pedal feels great. It's a bit lighter than the factory manual drums but not as soft as a typical power brake system.

My caliper volume is different than the Viper setup but it still demonstrates the ability to use a common manual MC on a big brake system.


When fitting my calipers, I mounted a rotor, wired it to prevent movement, and wedged a caliper in place using the brake pads and wood shims. Running the suspension through the full range of motion including steering angles put the caliper in it's place. I have about 1/4" of clearance to the upper control arm and about that much between the lower inner edge of the caliper and the ball joint arm.

I got lucky. Fitting those things had not even crossed my mind when I dropped the cash for them.