There was and then I edited it...
I have one in my '46. My truck is well insulated and weather stripped, so it is very quiet inside the cab. On high you know the fan is blowing, but it's not very intrusive, and you only really need high speed if the outside temperature is close to freezing. The electric servo-controlled water valve is great, as is the servo-controlled heater flap on the bottom of the heater to change between defrost and heat. Everything you need is included. You will be very happy with it, I have looked at and used others and in my opinion this one is the best on the market.
When you do use it, make sure that before you shut the heat off (on warm days specifically) that you turn the heat setting all the way to low and give it a second to close the servo valve and start blowing cold. This way the servo valve will close and you won't get unnecessary heat in the cab. We install them differently, using the 90° steel bends to go directly through the firewall, and then mounting the servo valve under the hood. It works great this way and keep the heat out of the cab when it's off.
