Here's a car that shows some interesting modifications. Driver Haruhito Yanagida ( boss of well-known Z specialist garage and race team 'CENTRAL 20' ) was a sometime Nissan 'Works' SCCN team driver, and had good access to some trick Works parts and cars. However, he also had some of his own ideas - as illustrated here.
This cars sports the full Works Group 4 aero package G-nose kit. Note the extra-deep rear spoiler and small 'flip' strip above the rear window, and the alloy side-skirts:
During the 1972 season, some teams experimented with fins on the rear deck.
Here's Yanagida again, this time in his much-photographed red/white/blue Hitachi / Checkman-sponsored car:
And another SCCN team driver in the same event - Seiichi Suzuki in the Maruzen Technica-sponsored Tomei car. Suzuki was sadly destined to perish in a race accident within just a couple of years:
