[machinehead323]

I am oversees right now but still have access to a machine shop. i want to make some sleeve hitch yolk adapters like below. i have some scrap 4" box tubing 1/4 wall. that gives me the 3 1/2 id i think i need. how wide are these adaptors normally? this looks wider than the one on my brinley box blade. why do they put three holes up top? i have only used my middle hole so can tighten my 2 bolts against it. i need to make the draft plate too. how far back from the front edge should i put my 5/8 hole? what is the normal bolt spacing from a brinly hitch, the 2 jam bolts? im sorry for so many questions but i dont have access to cubs in the desert.