In general,things like ignition timing and target AFR's can influence vacuum/pressure sensor readings to where the AFR's can swing all over the place. Even a single miss will influence the ECU interpretation of what is actually happening and cause it to think it is lean and then it adds additional fuel to correct that but then it will see it is now rich and pull fuel. Another miss and it starts over, back and forth ,back and forth. This will create a wild swing in AFR's that could be misdiagnosed as a vac leak. Anyway,as AA said,wait till you get it back together but in the meantime very carefully inspect your plug wires both visually and with an ohm meter,cap (inside and out)for ANY signs of carbon tracking ,same for the rotor. Look extremely closely for even very faint evidence of tracking that may only look like a very faint pencil line. If there is ANY corrosion/rust on ANY of the metallic parts inside the dizzy,find the source and remedy.