When Dr. Brackett's father is undergoing surgery, the anesthesia ventilator clearly says that it is intended for use with animals.
When The Squad Was Returning To The Station After Rescuing The Magician Trapped In His Trunk, The Older 1965 Crown Firecoach Triple Fire Truck Could Be Seen In The Engine Bay. When The Squad Is Called Out On A Run, The Newer 1973 Ward LaFrance Can Now Be Seen.
After the gas company shuts the gas pipeline off, they would have still had to deal with the kerosene poring out of the truck but there was no more mention of that leak.
At the end, when Johnny takes the orb to put it back together, he leaves a small piece on the table.