Arnolt then negotiated with Bristol Cars Ltd in the UK for the purchase of 200 of their 404-series chassis and the 1971 cc, six-cylinder 130 hp engines from the earlier 403 model. Arnolt needed to find a new chassis source to meet his obligation to Bertone, in whom he had invested heavily, after MG proved unable to fill the original order for 200 cars. The chassis Bristol supplied were sent to Carrozzeria Bertone where they received a highly aerodynamic body with a flowing design that allowed the minimal hood height to clear the cars' three single barrel Solex 32 carburetors. The bodies were designed by Bertone's new designer/aerodynamicist, Franco Scaglione (soon to be famous as the designer of the Alfa Romeo B.A.T. concept cars). The very tall Bristol engine created problems for designing a sleek-looking sports car. Franco Scaglione handled these with particular genius - first by incorporating a hood scoop to lower the surrounding sheet metal, and then by incorporating sharply creased fender lines out over the wheels to draw the eye's attention away from the unusually tall peak in the hood. A few design changes were requested by S.H. Arnolt.