sweet truck. Nice pics. Nice to be able to get some original photos. Does it still have the pump in it? If so it may have a number to track or even from info given by the fire station you can get in touch with pump maker (American Lafrance etc ) and get original truck specs. (you may have to find someone who copied / bought records from maker) Also pic 6 could be a primer pump but need much better angle shots, if it's on the bottom of the pump intake.
Good luck!
