Another option not mentioned here is to use one of the scv's to power the independent valve. Simply plug the pressure and return lines into the coupler and then tie the lever into position to provide flow. If you are trying to free up both valves for other purposes, of course that won't work, but I thought I would mention it.
The pressure line mentioned above is actually above the brake valve and slightly forward. It has a steel line attached that goes under the platform and feeds the rockshaft housing. It takes a 7/8" wrench to loosen it. If you remove the elbow from the clutch housing and install a tee, you can attach your pressure line there.
The pressure line mentioned above is actually above the brake valve and slightly forward. It has a steel line attached that goes under the platform and feeds the rockshaft housing. It takes a 7/8" wrench to loosen it. If you remove the elbow from the clutch housing and install a tee, you can attach your pressure line there.