I replaced the original proportioning valve on my old MM with a manual one under the hood. I replaced all the brake lines when I had the body off the frame and the old valve was frozen. My motive for going manual was $$$ not that I thought I knew better than the engineers that designed the system. <img src="/forums/images/graemlins/shiner.gif" alt="" />

Once I had the manual valve dialed in with the V6 brake components, it did great w/ 33s. <img src="/forums/images/graemlins/kewl.gif" alt="" />

'06 Dakota QC 4.7 6sp 4x4
'88 Mighty Max
'77 KZ1000 fun old bike