GRAN SPORT 445 — SERIES 44600 — This was the truly muscular Buick, with a new big-block V-8 and Hurst-shifted performance transmissions. Functional hood scoops dumped cold air into the big V-8's intake. Chrome red-filled lower body and wheelhouse moldings were used with five-spoke, 14 × 6-inch chrome wheels standard. A GS 455 emblem appeared on the left-hand blacked-out grille, with others showing up on the front fenders and a GS monogram appearing on the deck lid. Standard interior appointments were the same as on the GS. A number of mandated safety features were standard.