For 1958, the styling of the full-size Chevrolets was fresh and new and the cars were longer, lower, wider, and more luxurious. Despite a weak American economy, Chevrolet’s sales remained strong, and the new high-line Impala series accounted for more than 15 per cent of sales. Chevrolet continued to dominate the low price field, with more than 1. The trusty 283 remained the mainstay powerplant, but new for 1958 was the first of the company’s legendary big blocks. 1 million cars sold The new 348 was available in four different states of tune.
250 hp, 348 cu. in. overhead valve V-8 engine with single four-barrel carburettor, two-speed Turboglide automatic transmission, independent front suspension with coil springs, live rear axle suspension, and four-wheel drum brakes. Wheelbase: 117.5 in.
The Impala, a trim line of the Bel Air series for 1958, was at the very top of the Chevrolet range and was offered only in sport coupé and convertible versions. Broad ribbed body sill panels, insignia and crossed flag emblems at the front of the cove, large dummy chrome-plated scoops ahead of the rear wheel wells, trim features included Impala script, and two-spoke deep hub steering wheels with Impala medallions