The trucks we used had 1100 gal tanks. 800/300 split.
PTO driven John Bean Pumps
The reels actually looked like the electric Hannay Reels but they were belt/pulley driven by a shaft that ran the length of them that was connected to the PTO Shaft by a pulley as well.
My truck LR-3 ("LR" stood for Little Rock) was an International 6 speed standard with a "split" rear end. It scared the holy crap out of me a couple of times on some extreme inclines when fully loaded.
"The Poor Fish" circa 1930's: The Poor Fish wouldn't have been caught if he'd known enough to keep his fool mouth shut.
"Opportunity is missed by most because it is dressed in overalls and looks like work"- Thomas Edison, businessman/inventor