Just an aside for a moment ... I am far from getting my mechanical braked vehicle on the road so I have no personal experience driving with mechanical brakes.
Is it safe to assume there is more to this question than we've been told? I ask because I'm wondering if its worth the trouble to do this for a vehicle that, with all other things remaining the same), will not get driven much or far, will never see 40 MPH and probably won't get loaded very heavy.
Bottom line is that I think converting the OP's vehicle to hydraulic brakes makes sense if the rest of the truck is being heavily modified, as well. If not ... There is no "standard" way to do it. It probably won't be easy and in the long run will only be a marginal improvement over the original system.
Food for thought and like I said, if there's more to this than we've been told ... and this is a reasonable upgrade ... then we're talking unique situation with little or no existing documentation to guide you -- You can be the first!!
John
