Mine is a mid to late 70s 12hp with the top mount pump. I could get more out of mine by using a real belt. My multi-belt slips when pushed too hard. I made a set of 3500lb lines to replace the cracked originals (I work on heavy equipment for a living). I was just wondering what the capacity should be.
P.S. A float option would be cool.
do yourself a favor and get two good belts to put on the hydraulic pump. One to use, the other to tie up out of the way for when the first one finally breaks.