That's where I got my voltage booster from, it's the same one I’ve installed in mine sailor. I power a Sony CDX-GT420U, AM/FM/CD etc., plus my 12v tach is powered by it. It works just fine and I’ve had no problems with it. I’ve often parked at a show for several hours and forgot to turn the radio, tach and booster off, (I have it switched separately from the ignition) even after leaving the radio, tach head and booster on for several hours the truck started just fine, so there is very little drain on the battery.
I see in another thread that you were considering converting to 12v? On my stock 1950, 3604 all of the electrical connections and components have been cleaned and restored/rebuilt I have not had any trouble starting even in the cooler weather or driving at night with it over the last 2years and approximately 6,000 miles. I think the 6v system is completely adequate for a relatively stock AD truck if you maintain it properly and keep it in top shape and see no need to convert to 12v unless you are planning some major upgrades to the vehicle or using it in an extremely cold climate.
Denny Graham
Sandwich, IL