I tried some helpful - hopefully informative - comments, and they were met with...
But anyway...
Depends on year and market model. People think that terms like "260Z" and "280Z" mean one thing, but these cars had rolling detail changes in between major updates. The North American market only had '260Z'/'260Z 2+2' models for a year before the '280Z' and '280Z 2+2' models were introduced, whilst the other Export markets never received any '280Z' badged models at all and continued with '260Z' badged models until late 1978. This complicates matters regarding specs and parts interchange. I don't believe you have mentioned exactly what it is you have bought anyway...
You need to know exact market model, year and - ideally - month of manufacture in order to fully understand what will fit and what will not. Floor pan panels had radical changes in the years concerned, so asking for "260Z 2+2 floor panels" or "280Z 2+2 floor panels" will not necessarily get you what you want, especially if you are looking at suppliers in predominantly RHD markets (like Australia).