Prince launched racing and road version of Skyline 2000GT in May 1964. It was based on the S50D-1 and used the "G-7" engine from the Gloria S41, though the car needed a extension to the wheelbase (all forward of the cowl) to provide space in the engine bay for the inline six. It entered the second Japanese Grand Touring II (GT-II) on 3 May 1964 and they hoped to win the race. Competitive against the Porsche 904, the Skyline GTs managed second through to sixth places.