I recently tried converting my 70 C10 250ci to power steering, I bought all the parts from a very reliable local bone yard. The parts are not from the same year vehicles, he went by his book which said certain parts would fit and work. The pump and brackets are from a 72 Nova 250ci, pulleys etc. The box is from a early eighties chevy truck. Everything bolted right in, the only thing I any issue with was the hoses (old style pump new style box, fittings) but I had a custom line made. My problem is it still don't work, it took over a quart of fluid. I put the truck up with no pressure on the wheels and turned it from side to side several times and took it for a ride, no power steering. Any help or suggestions. The bone yard is closed till Monday at which time I'm sure the owner will help me. Does it sound like a weak pump or not enough volume??: