I just have no idea what all the previous owner went through and/or did with this car, but talking with him he did not seem very mechanically inclined. Ya know there is one thing that I have not seen people mention hardly at all in replacing these NorthStar starters, and that is bench testing them before installing them. I worked in heavy truck & automotive parts at dealerships, and many times have pulled parts off the shelf that were bad. It happens, so better safe than sorry.You aren't the first (or last) to find a broken starter snout. We just had a Deville in the shop for something close to that. Broke off the mounting bolt side/ear.
As Ranger posted, get a junkyard MAF. That messed up honeycomb is right in front of one of the heated resistors - airflow changes the resistance which sends signals to the PCM. Post #6.
Yeah that MAF was a booger, and it being glued or whatever in caused more problems. The heat from the fire probably caused it to give way, but not before stretching the vanes out. Now that it is back tight I could straighten it more, bu I am not in a dire situation, and have time to find one on a Caddy or Olds to replace it.
It's kind of funny with the people that have a bit of a negative opinion of this motor set up, but so far for me it is just doing a little research and using common sense. If you want to work on something that will really have you scratching your head try a NSU with a Wankel Engine