The other visual change to this model was that it had a different grille than the previous two models and used the grille from the 1966 S50E-3 Skyline 1500 which had a wide horizontal bar running across the centre of it.

Mechanically the car was mostly unchanged with the base model S54A-3 Skyline GT-A having the 106hp Prince 1988cc overhead cam 2 litre engine with a single down draught carburetor and a 4 speed gearbox, and the S54B-3 Skyline GT-B having a higher compression version of the same engine that was fitted with triple Weber 40DCOE side draught carburetors and a 5 speed gearbox. The cars could be identified from the outside due to slightly different badges on the side of the car, on the GT-A the GT badge was blue and white whilst of the GT-B it was red and white.

Things got a bit confusing with the actual naming of the car in it's final years. Behind the scenes, in 1966 Nissan and Prince had merged and the Prince name was slowly being phased out. Depending on the market where the car was being sold the way it was being advertised and even the badges on the car could be completely different. In Japan the car seems to have continued to have badges on the side that said Skyline GT, in some markets it instead said Prince A200 GT, and late Australian cars said Datsun A200 GT. Similarly with the sales brochures and advertising it was equally confusing with some referring to it as a Prince A200 GT, others as a Nissan Skyline GT, and others as a Datsun GTA and GTB.

In October the S54 series was replaced with the all new GC10 Nissan Skyline series.