[bbbentley]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: resto4u</div><div class="ubbcode-body">Were the a/c curved neck radiator the same as the copo radiator. same codes? </div></div>

Yes, that is what the radiator's original application was for (A/C). The COPO just happens to use the same a/c radiator. Whether this radiator was specified by engineering or requested by a dealer (Yenko or Gibb) as part of the package (9560/9561), I am unsure. The A/C application is why the neck is curved, so to clear the compressor and related lines. A 4spd big block with air is probably rarer than a COPO. That is why 4spd curved necks are scarce. Whereas BB a/c auto are relatively easier to find.

Incidentally. The side with the date is the RIGHT side, the OO tank for manual, which by your original post, I assume is what you want, and that tank is the same whether a 3 core (straight neck) or 4 core (curved). That is why the code is different on the LH side as one is 4 core, curved =IO and one is 3 core, straight= IL. Those who responded with IL tanks where probably trying to let you know their radiator had the One thing you had specified- A B dated tank and that gets you 1/2 way to what you want. You just have to find an IO tank and you can make the correct part.
Also, some times line shortages required using next biggest radiator. My BB car has a curved neck that is original to car. My experience (at least early BB cars) have rad. dates about 3 months earlier than build. Mine is a Sept date. Dec 68 car.