can I fit my datsun 1600 heater box to my fj20 heater hoses. Also not to sure where the heater tap is for a 1600 or where it is located? also having truoble connecting the cables and which one goes where any help would be much appreciated

the tap is on the rh side of the heater up against the firewall....

go the FJ!

Just a few notes on connecting the stock heater to an FJ20 engine: -
It matters not which heater pipe is IN or OUT.
Lose the stock 510 heater tap, it has and always will be a piece of crap.
Fit a Bluey type tap, it is all plastic and virtually failsafe/leakproof etc.
The passenger side hose from the heater has to do a complex double 90deg. bend as soon as it enters the engine bay to clear the head of the engine.
I used two 1/2" copper water pipe elbows soldered together to achieve the abrupt change of direction.
Pics. available
By cables, I assume you are referring to the heater/vent cables?
Well, the "heater" cable routes to the heater tap wherever you have located it.
The "vent" cable connects to the demister/cabin flap arrangement to direct the air into the cabin or up to the windshield.

_________________
Regards, Graeme
Just trying to help...
http://nissanman.shutterfly.com/
graemes@internode.on.net

what exactly is a bluey type tap and where could i get one? does the cable connect up to this bluey type tap? thanks heaps

It is a heater tap from a Bluebird.
My mistake if you didn't twig
A circular plastic housing ~70mm diam. which is mounted in the engine compartment.
The double whammy here is that it is simple, non corrosive and if it does develop a leak, it is not in the cabin
You will need to make up a mount for the tap and use a longer cable to operate it but it is far superior to the plunger tap the 510 uses

_________________
Regards, Graeme
Just trying to help...
http://nissanman.shutterfly.com/
graemes@internode.on.net

Couldn't agree more ..... either they leak or seize up, and are a comlete bastard to change. Involves contortions that would have a russian 12 yo gymnast in trouble. I made the mistake of replacing a seized one with a new item once .... lasted about 6 months before it seized too. Cut my hand to ribbons on the mounting bracket as well. After that
I just ran it without a tap altogether. Didn't produce that much heat in summer with no fan and at least I could defrost the windscreen (Canberra ) in winter.

Cheers, Neil.