Just got through rerigging my boom, so here's my two cents.

The outhaul tackle consists of a fixed single block with becket and a floating double block attached to the outhaul wire. The fixed block is attached to a 3/8" throughbolt about 6" from the mast end of the boom tube.

Started to tell you how to build a watch when all you asked was what time it was. If you would like the results of my many mast and boom fishing expeditions, let me know.