Welcome Bamafan0001!

Congrats on your recent acquisition. With the usual very low mileage of former fire trucks, your truck should have be in pretty good mechanical shape with lots of life left in it.
While you ponder on questions you need to ask in the various Tech Forums, based on your indicated location you are right in the midst of the
The Southern Bolters region. Check out that forum and introduce yourself in there as well. They have a bunch of upcoming events you may want to check out too.
You may also want to checkout the
Big Bolts forum as you truck fits right into that category.
Looking forward to more conversations in the future.

Dan
EDIT: I see Miss Peggy beat me to the 1st welcome - haha. Just me too slow on the 2 - finger typing speed.