Yet *another* update. After getting the tank back in, everything hooked up, ect ect. Fire up the truck, few miss fires, replaced the plugs, cleared up 2 of the random misfire cylinders, still had 2 more going on, replaced cap and rotor (which was put in in 2018, but was fairly worn out already somehow), and new wires. Same issue, random misfire on 3 and 4. The next thing I can think of, is the fuel injector spider. I got a bunch of Barryman B12 in the tank, about 5-10ish gallons of E0 top tier 87, at this point, it doesn't seem like it's helping the spider, and the poppets it seems. At this point, I'm expecting, I need to replace the thing, and I'll probably get the upgraded spider, with the injectors instead of poppets, any thoughts on this?