I'm with Cletis - and the hydrovac in the 60's is pretty much identical to that in the 40's and 50's - just slightly better/bigger regular brakes, NOT designed to stop the truck + 5T in any unusual situation - you'd be well advised to get a trailer that'll handle it rather than exceeding the licensed GVW

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics