Ok let me start over. From searching images I found that using a letter before a # is NOT common on most Fire Trucks. But I searched specifically for this truck on the JBA web site and finally found some images. The "Q74 has been on the truck since at least 2014. 1st image (i think is the same truck) with no #. Second is from 2014. 3rd is from May 8, 2018. Happy accident that the number of the truck was the same as the post? Planned? I still believe this was intentional, but must have had a lot more forethought.
I'm not sure what you mean. But I haven't believed in coincidences since before Q came along. So seeing the truck did exist for some time with this number puts some more questions into my head, did he plan that drop to be #74 so it would match up with the truck, or did he just take advantage of the opportunity?