Loader B20. Adding extra valve for snow plow

[robs660]

I have picked up a great old Meyer style snow plow that I have built mounts to use on my loader. I am looking for advice on how to add extra hydraulics so that I can run power angle function and possibly in the future a grapple. (not likely any time soon). My dealer was no help with this!
I am a good mechanic and fabricator. I have access to a good hose shop as well so building the thing should be ok once I know what to do?

Help. Before the. Snow comes!

 

[BruceWard]

I believe the B5550A trencher worked with the B21 as well as the B21. The B5550A used a power beyong block to create a third hydraulic circuit on the B21. This power beyond block may be your solution.

I believe this to be the B21 power beyond block Part Search