Didn't notice fuel filter on the list........
Maybe crawl under and check that you didn't miss one.
Could be that the pickup sock in the tank is clogged. Trying blowing into the tank through the gas line and have someone listen to hear if it bubbles. I blew out all my hard lines with the compressor, and replaced all the rubber.
My last truck was a 84 chevy 3/4 ton 2wd 350, I traded for my j10, and then did everything I just did to the chevy to the j10. Got rid of the motorcrap carb and put on my qjet
Other than the carb and the return line from the filter, the fuel system's pretty much the same as the chevys.
The two hoses off the canister should go back to the vent on the tank. Both hoses. 'Should' be another to the carb....