Ed,
You've probably already learned this, but that pump on the front is a Barton U-40 (maybe a U-50), 400 (or 500) gallon-per-minute job. Sold by American Fire Apparatus out of Battle Creek, Michigan (no longer in existence). You've also got their vacuum primer under the hood on the fire wall, a pretty cool little bit of engineering to prime the pump using manifold vacuum.
I've got some manuals and schematics of the pump, if you need 'em, when you get to it. I've got a couple of these pumps at my place, one's on a '41 Chevy. I love talking about 'em, so message me if you want.
Congratulations!
-Michael
