Make sure all the connections are plugged in. The MAF sensor on the filter housing is and easy one to miss. The truck should run good if the o2 sensor is dead. Is the dist. lined up properly? Cap and rotor good? Wires and plugs good? My gen1 shook a lot with one cyl not firing even with good motor mounts.

I just want to tell you both good luck, and we're all counting on you.