New post on inherited boat. There does not seem to be any where to attach the boom vang (also no boom vang came with boat). I have seen some boats with and some without. In fact the original manual does not show one. Question is: should one be installed and if so, what is the best method.
I would pick up a bail or eye strap for the boom and if your mast tabernacle has a utility plate under it with holes for blocks and etc., you could Mickey Mouse something that you could attach the bottom of the boom vang to.
When I bought my boat new years ago the boom had two small eye straps in a track under the boom that were free to slide. One of them was for a vang and the other was for a reefing line. All I needed to do was figure out where to rivet them in place which I did. There were two other eyes staps that were already riveted in place, one at the gooseneck and one at the end of the boom for my old mainsheet to the backstay set up which I got rid of years ago when I mounted my traveler. Just last year I cut the eye strap off the back of the boom and mounted a nylon wire strap in it's place for my bungee cord sail tie attachment. As you can see in the boom pic, my eye straps swivel from side to side. The other pic shows my mast Tabernacle with the utility plate. There is supposed to be a back plate with holes in it similar to the front plate and two side plates but I cut it off because it interfered with my mast raising.
For the boom vang; Check out a marine consignment store for two double sheave fiddle blocks, one with the cam cleat bolted to it and pick up the braid line for it. You can always buy a new one but they're pricey.
I favor a boom vang that can be used in a pinch for a main sheet and for this reason I wouldn't want a vang with a ball on the end of a wire for a special fitting on the boom. Also, I have an extra long braid line on my boom vang and use it for mast raising/lowering over my stern.