Performance online disc brake conversion kit

Just wanted to give my final thoughts on the Dr. Diff willwood brake conversion kit. I was told everything was going to be bolt on, not entirely true. There was two things that I had to modify in order for it to work. First thing was the new wire braided brake lines where they secure to the inner fender bracket with the clip- the factory hole was too small for the brake line to go into so I had to get a rat tail file and enlarge the hole. Not a big deal but another trip to get a tool and about 10-15 minutes per side. Second thing was the brake valve. The factory valve arm that secures the valve to the frame is about 1" longer than the new unit. So I had to bend 5 brake lines in order for it to fit. Was a pain in the *** and I'm lucky this is a California car so not a lot of rust on the lines so none of them cracked. Little things like this should be mentioned. And I emailed Cass at Dr Diff prior to installation and asked if there was anything I needed to know about the install and he never replied. Oh, yeah one more thing. With the new master cylinder installed brake pedal to master rod is a little too short. So I had to turn my brake light switch in and now all of sudden it doesnt work so it probably took a ****. So much for, " Its a direct bolt in kit"- Don't give me that BS!!!!!

First, absolutely nothing is 100 % “direct bolt-on” for every 50+ year old car when you’re talking about aftermarket parts. These cars were definitely not all identical rolling off the assembly line. What bolts right on to one car may require modification on another.

Second, the brake line thing. I think my earlier posts made it pretty clear that if you switch from a distribution block to the later combination valve you’d need to modify some brake lines. The combination valve DoctorDiff sells is an exact reproduction of the original disk brake combination valve. It is a direct bolt on if you use brake lines made for a later disk/drum car. If you reuse the drum brake lines intended for a distribution block, you need to make modifications. That’s not DoctorDiff’s fault, if you use disk brake lines like you’re supposed to they fit fine.

Adjusting the brake light switch is something that’s required pretty much any time you change major brake components, that’s part of the deal too.