1957 F-700 Firetruck
 

Hey Guys, Newbie here. I am looking for some help decoding a VIN for a 1957 Big Job F-700. It's a fire truck that was manufactuered by Seagrave. (job number K 2305, 1/9/58) The VIN on the "warranty plate" is: F70L7U50478.
WB 156, Color R, Date 20 J, Trans F, Axle 24, GVW 21000, Net HP 153.

I am in the process of restoring this truck to it's former glory for our fire department. Through the years a lot of information has been lost. Any Help would be great. I have been combing through this site for days now. Any other resources would be much appreciated.
Couple questions,
What motor? I know it's a V8, but I don't see any other markings.
Any online stores that speacialize in emblems and parts?
Thanks again!