From where, I could get oil output line?
 

I don't have heating in my car and will put this radiator up front and push oil through it. I will attach a blower to it therefore getting hot air. Lowers engine temperature and gives me some heat if i need it.

What i need to know is where to hook up the additional oil radiator, should I just do the plumbing the way they hook up the additional coolers?

Oor, is there a way to hook it up in the engine compartment?

The biggest problem I see with your idea is that the thermostat will not open and allow oil to run to the cooler until the oil temp. gets over 200 degrees, which in your part of the world probably doesn't happen that often. If you hook the cooler up without the thermostat you run the risk of the oil/engine always staying below 180 degrees which is not all that healthy for the engine and is not going to provide you with much heat.

Yea, but, people who put turbos in their car, take oil somewhere for the turbo bearings...right?

Yes ... but they (we) do it at the idiot light or pressure sender with a 1/8 ID T-Fitting.
That'll flow enough oil to maybe warm a cup of coffee.
Nah..not even that much.

How about a gas fired Webasto heater for the smuggler's box?

"Crying"...Naah...u guys are ruining my idea... :)

I've seen small boat elec units in many sizes and shapes.