Ali,
The heater in the picture is the earlier Warmaride heater. Normally the FB/EK's have the square type, but the round one is a perfectly acceptable period accessory - my bet is that more than a few FB/EK's were fitted with these by dealers.
The dual dash switches (generally) require some buggering around no matter what heater you put in (I assume you are talking about the chrome plated slide switches on the dash). The "heat" one can be rigged up with an aftermarket valve (highly recomend the “Universal 5/8'' or 16mm Cable Operated Heater Tap” (part number HA4008) available from Speedy Air Spares, 41 Beatrice Street Bundaberg QLD 4670, Phone (07) 4152 7693, E-mail
jeremy@speedyairspares.com.au,
http://speedyairspares.com.au). The tap can be fitted either in the engine bay or under the dash (neater) and requires a bowden cable to operate - buy the bowden cable from SuperCheap, Rare Spares or your local mower shop

. The "air" switch should already be connected by a bowden cable to the plenum door under the dash.
This may help:
http://www.scribd.com/full/37747089?acc ... ejxi2r1r8t
Cheers,
Harv.
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a BB/MD grey motored FED.