I have Dobinsons IMS shocks but kept my OME springs for now. My fender measurements are 361/8" rear and 36 1/2" up front. I am running 255/80R17 which is a true 33" tire. Interesting your one inch higher all around. I am guessing if I get the Dobinsons spring pack I will have even more...
Mine is stock for sure. Maybe it depends on year? Mine is an 88. Also yours seems to be bolted which may help you move it away from shackle where mine is welded/ non movable.
I had OME lift kit and shocks on (the heavy ones) and it was a harsh ride. I switched to the IMS Dobinsons and now actually enjoy the ride. Every pothole and bump was teeth jarring before with OME and now it soaks up a lot of it. Not like a modern vehicle but doable now. I am not a vendor...