1. Found and fixed some bad vacuum lines - there's a "T" behind the left side of the intake which was rotted through. Glad to have found and fixed it, but did nothing to change the misfire.

2. Swapped out the #6 spark plug wire (OPParts brand) for a better quality OEM wire. ?No change.

3. Plugged in a brand new Coil pack. ? Seems immediately better when I idle and rev up the engine. ?However, I stripped a bolt while trying to remove the old coil pack, so I've not been able to put the van back together in drivable condition yet. ? ?A bolt extractor is arriving tomorrow.

Picture of the vacuum tube - I don't think this is rodent damage, but it's pretty torn up, isn't it?