Proper rad for L-78 nova

[CDNL-78]

I presently dont have the correct rad in my nova. I have been looking on the internet at a few different sites to find a proper looking repalcement. Classic industries has two listed, a 3 row, and a 4 row. My GM docs dont list anything about a HD rad being installed, so am I correct in thinking that a 3 row, was installed in my car originally?? Any links or part numbers would help me out, so that I can get the correct looking rad for my Nova. Thanks in advance.