It would have made more sence to be # 63, as it WAS #63 of the 1,015 1988s. Screw "Series I" and "Series II". ((Was there ever a "Sereis III planned?)) ~ Well yes, there was, but only in ascMcLaren's collective minds.
The 2001 as shown on this site, was to have 2 alterations.
#1, was a low profile pedistal-type rear spoiler with built-in looooooong skinney stop lamp and # 2 was to have newly styled 16" wheels.
Royal Gold Metallic was being sent to color heaven.
British Racing Green Metallic woulda been the new one.
The Tan Top was to return and the Dark Brown top was going bye bye.
None of this, of course happened....