If you have the 6" diameter pulley, you should need a Gates 9570 belt. I have a 7" pulley and am running a 9580 belt, which makes it sit just a tad to high, but is ok now. At the time all I could find fast was a 9580 and 9570 belt. I have ordered a 9575 belt now, so when I put the York back on after all the test fits of the new brackets, I can put the new belt on and have plenty of hood clearance.
Trailbus was right on the money!! I prefer the 111 and 112 just because I like JIC fittings, but 113 and 114 are probably much easier to work with. Personally, for the suction side I would use the JIC fittng (112)adapted to your filter with a 45 degree JIC adapter to pipe thread. Then on the pressure side use the hose barb (113) so you can clamp your high pressure hose to it.
Trailbus was right on the money!! I prefer the 111 and 112 just because I like JIC fittings, but 113 and 114 are probably much easier to work with. Personally, for the suction side I would use the JIC fittng (112)adapted to your filter with a 45 degree JIC adapter to pipe thread. Then on the pressure side use the hose barb (113) so you can clamp your high pressure hose to it.