Hi Matt and welcome!
I think the answer to your question depends on what your intent is for the truck -- Are you intending to drive it loaded (heavy)) or just drive around in it as a fun truck (light)? If you plan on carrying loads, you may want to reinstall the hydrovac system. Short of completely upgrading the brakes, it may be your best and safest bet. The hydrovac units are available (rebuilt or kits). If you go that route, just be aware that using silicon brake fluid (DOT 5 here in the US) is not adviseable with the hydrovac system.
If you are mainly going to just drive the truck around for fun (i.e., light/empty) the brake system without the hydrovac system installed should be okay. I drive my '49 4400 around that way and the brakes were sufficient. Having the hydrovac installed on a trrck that will be driven relatively light will give you touchy brakes -- my '65 firetruck has hydrovac brakes and when I have no water in the tank (1,000 gallon capacity), I have to be careful on the brakes and have locked them up on more than one occasion -- which is sort of embarrassing ...
Good Luck!
