I recently purchased a 1990 F350 with the 460 in it as a "no run" truck. After the standard tune up components I still couldn't get spark and long story short the PIP sensor in the distributor was bad. Now that she's running she's not running all that great. Runs a little rich and pops/backfires under load.

Previous owner had done an EGR delete and I suspect that they didn't do it right and I have vacuum issues (maybe even a missing O2 sensor but haven't dug into it yet). What my main question is, does anyone have any diagrams highlighting the emissions system for these trucks? Vacuum diagram, EGR, smog pump, etc. This is a California compliant model so I assume that probably also brings more into play then what I'm used to (first one I've ever actually seen).

And before anyone jumps on my case about emissions: I'm in a no vehicle inspect state, please don't tell me to put it all back the way it was or it won't run right (I've seen those forums and have a 351w running great on basically 3 vacuum lines and an O2 lol). I'm just looking for info on the system so I can diagnose the issue