That panel probably came from one of the cars with the lower performance engine in it - seems to me that there was a 270 or 290 on the low end in '63, with the fuel injected top end one at 350. In '64 the high end went to 375 for the fuel injected engine, with a carbureted version of the same engine at 365; that's what I had, and the tach on mine went to 10K with the red line at 7200 - the rest of the panel was exactly like the one you show, and they were essentially the same all the way through '67. The oil pressure gauge is standard, and in my experience any Chevy small block I have ever had ran the oil pressure at 40 to as high as 70 at cruising to high acceleration, and would drop to 15 to 25 at idle. As to rarity or value, I couldn't say; the tach might make it desirable to someone doing a high level, correct restoration, but not to a guy who just wants impress the unwashed masses. As I remember things, that 7200 RPM red line was quite impressive in those days, and many who didn't dabble in real high performance were very smitten by it; it was always one of the first things almost anyone commented on when they saw our car for the first time.