The hydrovac will NOT help you stop better. It only makes the pressure required of your legs, less.
I would do a preliminary check of all moving parts in the brake system and make sure everything is adjusted accordingly. As mentioned above, a stock system is more than adequate for hauling the weight you mention.
The huck brake system does require normal adjusting of each brake shoe seperately if the truck is used as commonly as you say.
Is this system stock?
Jeff
