Posted by Kevin [172.68.234.181] on Tuesday, August 26, 2025 at 17:06:28 :
Hi All,
Thanks for all of the help lately!
Truck is a 67 WM300, has the under cab MC with the access panel in floorboard. I've converted to 4 wheel disc and trying to figure some things out.
A- I'm going to try to use the MC that Paul in NY recommends in original mounting spot, non boosted. I'm not sure how this is going to go, if it will bolt up or not etc. The later trucks with the different pedal and undercab MC are different so not much info.
B- Trying to figure out the metal brake line size for the whole truck including where it enters the MC(specs show different port sizes). Do I need adapters/reducers?
C- I think I need a proportioning valve to limit the rear from locking up. How would I source that, where is it mounted?
D- How about the dash brake light low fluid switch/light, how do I incorporate that?
If anyone has done this conversion on the later truck, would appreciate any info!
Follow Ups: