First rule of this conversation is don't badmouth the guy's car. So...this is very nice restoration with very heavy "provenance" on workmanship. This looks like a Pierre, very 'Vintage Z' vibe. However, there are too many incorrect inconsistencies to mention. As i feel about the 'Vintage Z' restorations, I observe about this car; a "parts replacement" restoration. It is fresh and clean and new looking because the parts have been replaced, in many cases with date incorrect pieces. And that's just what these sort of restorations are all about. Extremely nice, almost new condition, perfectly acceptable for show and dance. In this case, assembled by craftsmen who really did a nice job.
No, the early cars were not underbodied black. Spare tire well is missing the velcro and the alignment stickers. Interior tail light panel cover is the later style with the access panels. I could go on and on. But how about this? The 240Z badges would be chrome Zs and the gas door knob would be the vertical version. I learned about early tail lights recently. These are later version replacements.