Much appreciated Tbird.
Not to sound like a total noob but when you say add a can to the vacuum line, I'm guessing you mean to detach the intake manifold vacuum hose from the housing and stick the hose into the can and let it suck it up?
After it sucks it up, I assume I reconnect it and then drive it around until it stops pitching a fit?
Thanks for the rest of your advice. I'm going to try to knock out a few of the items on the list (fuel filter, diff change, tranny flush, plugs/wires, and this additive) this weekend. | 
