I've got a 70 C10 drum/drum dual res master and booster under the floor of my 48 4400. I can lock up all four corners with 6 ton of rock on the back and an 8' snow plow on the front. It's plenty big enough, there's something else going on with the bus,
Scott

Scott Ward

2 1948 1.5-ton Loadmasters
The red one and The snow pusher
1 1950 3100
1 1955.1 Chevy 6500
1 1954 Chevy 6500 2-Ton
1 1955 1st Series COE 5700
1 1963 K20 (454)
1 1964 C10 (350)
1 1951 1.5-ton Dump Truck
1953 and a 1956 Ford F800

Raising a teenager is like trying to nail Jello to a tree!