Complete unit from a Mk1/2 Austin
Mini Small/compact and chucks out more than enough heat for an A.D. cab.
I've got mine tucked up behind the dash in the center so only the integral control panel is visible just below the middle of the dash,you can even hook up the demist fairly easily too.
I've been toying with the idea of adapting the air intake to fit the right hand cowl air intake to make it fully 'fresh air'
I bought a push/pull choke cable to open/close the heater control valve.
Works fer me!