The convertible returned for the 1964 300K, but the "cross-ram" engine became an extra-cost option available on the 300K only. A 413 cu in (6.8 L) Wedge with a single Carter AFB 3614S 4-barrel carburetor, a regular intake manifold, and 360 hp (270 kW) was the new standard engine. Leather upholstery was no longer standard either. All this reduced the baseline price by over a thousand dollars, and sales responded with the largest total ever; 3,022 coupes and 625 convertibles. A center console was standard.