No direct bolt in. There are 2 types of pedal setups for the 39-46 trucks. One has the MC mounted to a bracket on the side of the bellhousing. The other, which was used on larger trucks has the MC mounted to the frame. IMHO it would be eazier to adapt the frame mounted style MC for a power booster. The system uses a clevis mounted off the brake pedal that ends up pulling a lever that is mounted to the frame. There would then be a push rod, and a Master cylinder mounted backwards with respect to the vehicle. the pulling on the lever actually creates a pushing on the MC. A frame mount bracket would be readily available for a booster and MC. Just need to drill a couple of holes.
John
