I uploaded a pic for you of my left-right alt braket adapter cheat... but i forgot who asked. its in my gallery. You also have to mount it lower.

You can buy my braket off me if ya want(or anybody else) ive moved it the the late position so more room for a snail

sorry dodgeman, obviously i havnt made myself clear enough. thanks for pointing it out for me to fix. this is just what i have found.
The alternator bracket is off an early model a12 (dizzy at front) with the alternator on the left hand side of the engine (as sitting in the drivers seat looking forwards). Trying to fit it to a15 as i want to run alternator in same position.
Mount/braket didnt fit obviously as the block wont allow.
Wont allow becuase the tapped holes in block are wider than the holes in the bracket/mount from alternator.

So i slotted the rear hole of the mount/bracket to get the alternator in line with the crank pulley and waterpump. Slotted front hole in mount/bracket so that it fits with the hole in the block.
So we have the mount in the right position, the alternator in the right position.
Now, i meant the coolant inlet on the left hand side of the engine as looking from the drivers seat towards front of car, surely you must have realised what i was on about. No need to be difficult.
Anyway, this is longer on the a15 than on the early a12's. Because its longer, you can either cut down the inlet and hope there is enough room to not have to modify alternator adjustment arm or you could just modify arm straight out of the gate.
This is what i did by choping arm in half and adding a section in the middle.
The a12 drive belt is shorter than the a15 one.
But the a15 one is too long for how i've set it up (alt on the left) and the a12 one is two short.
Solution, i need a belt 20mm longer than the a12 one. a lot of shops that sell belts should be able to help if you have the a12 one.

Anyway, those are my findings when trying to fit alternator on left side of engine with alt bracket from early a12.
Im just writing down my findings to maybe help someone else out there who may be wanting to do the same.
Also for the record, im putting alt on left side as the nismo oil pump on the a15 wont allow alt on normal right hand side.

Hope someone got something useful from this and it made sense

The determination of left & right has been an industry standard for well over three centuries, yes, dating well back to the horse drawn era, & possibly even back to Roman times for all I know.

Calling the 1200 engine an A12 is technically correct, however the designation also includes the later, different A12's, creating confusion, particularly when relating to those parts that were changed between the two designs, like alternator mountings.
Refering to the engine that was used in the Datsun 1200 up to 1973 as a '1200' engine removes all possible confusion & avoids needless explanation later.

Sorry for being a pedant, but it's one of those character traits that you all know & love me for. [Yeah, ... right]

hey cheater, the a15 at the top of the block for the thermostat should actually point at a different angle then the a12 one too. if you have the a12 one then your hose will hit the alternator liek you have written here (i had same problem).
$8 for a new one of ebay and all sorted. $120 for postage.... ripped but great quality

yea no probs man. my bad for not thinking which is left or right
i just wanted to put down my findings of todays work to maybe help others. After all isnt that why we continously track the threads of this forum, to gain knowledge of our dattos in order to make modifying and maintenence easier.
Will try to be more accurate in my explanations in the future.

Quote:
Actually the thermostat housing is actually an outlet for coolant but im just being a dick
Cheers for the input

Thats what i did. Pretty simple really. Saves the pain of rewiring the altinator and stuffing it up like i did!

While cruising the Pitroad website I noticed that they offer a kit to move the alternator to the left side of the later A series engine.
It's available for something like $150 US [cough, gag, choke] but at least it looks to be well made. [For that much, it had better be.]

that alternator adjustment arm looks exactly the one that i made in about 5 minutes.
The photo of the alt on the engine also shows where and how i pretty much mounted it.
Except i used standard "1200" alt bracket.
That bracket that pitroad sells, does however look very nice