The Phase IV was destined to be the king of the hill but got canned before going into production. Only one production model exists and it's privately held. Hopefully the owner is a GT (Gran Turismo) fan!
1972 had "caps" the same as an XY stainless caps. Later changed to GT centres (exposing a chrome wheelnut and having a red GT in the cap) at sometime in 1973.
The only option was the "sports road wheel", a 5 spoked alloy centre welded to a steel rim. These are the same wheels available on the XYGT and the XBGT.
Tyres E70HR14
Instrumentation:
Speedometer: 140mph
Cleveland Tachometer: 8000rpm - Later cars had 7000rpm tachometers