The 1957 had a well-integrated design, with two variations: the smaller Firesweep body placed on the concurrent Dodge 122-inch wheelbase chassis with Dodge front fenders and the Firedome and Fireflite (and its halo model Adventurer sub-series), based on the larger 126-inch wheelbase chassis shared with Chrysler. As was conventional in the era, subsequent years within the typical three-year model block were distinguished by trim, bumper and other low-cost modifications, typically by adding bulk to bumpers and grilles, taillight changes, color choices, instrumentation and interior design changes and often additional external trim.