Well. I cut the fuel line between the shut-off and the carb and the line was so rotted inside that there was a pile of black dust. I then removed it and replaced that part of the line with new as well as a fuel filter. I tried to idle it down and to accomplish this, I had to loosen the cable and turn the idle screw about 2 or 3 complete turns and then reset the cable. I let it warm up and then adjusted the carb and it now runs surprisingly smooth at any speed. If I order the rebuild kit, it may just set on the shelf for awhile.
Tahoe, I think you are right about the air filter. I have seen pictures of both setups. In the engine manual that I downloaded, the picture on the front page shows it on top, just like the suburban 10. Then in the following pages and the parts list, it shows it on the front.
I need to change fluids, grease and oil things up a bit and check the front wheel bearings. There seems to be a lot of slop there.