This adjustable pin wrench is $4.99 in Harbor Fright. Take a brand new filter identical to the one you have currently on and see if you can find one whose pins aligns with the holes on the upper plate. If you cant, buy two and, remove the short leg feom both, cut the long keg of one of them so it fits the holes on the filter and bolt it or weld it to the other uncut long leg.
Remove the riser if equipped and the elbow. If you still cant reach, remove the exhaust manifold.
turn this thing into the right direction you may want to have it with a hammer the most important thing is to do that in the right direction if you are looking at it from the top this will be clockwise direction the only position that you will be turning counterclockwise is if you are actually looking at it from the bottom which you can not do unless the engine is removed so again if you are looking at it from the top you will need to turn it clockwise. Good luck