Radiator core support

[ggtsvnv]

 I tried searching but didn't turn up anything so sorry if this is a easy one to answer. Is there a difference in core spports between years? I'm sure they all interchange but are there other differences? I need one for my 67 and have ran across what looks to be a good deal onone from a 68. I would like to keep my 67 as correct as possible even though it needs a lot of work.
Thanks in advance!

[cook_dw]

Quick search but basically 3 or 4 difference styles.

1967/8 (addition of the dimples for A/C seal, not sure it's been confirmed when the timeframe was established), early 69 & late 69.

http://www.camaros.org/forum/index.php?topic=4655.msg30335#msg30335

[MO]

All interchangeable, but there are many differences between the years.

[KurtS]

And the service part is also different - lots of minor differences.