Giotto Bizzarrini had worked with Alfa Romeo before leaving to join Ferrari, however after turning the Ferrari 250 GT into the famed kamm-tail 250 GTO he was persuaded away to the fledgling Lamborghini company where he worked on the V12 engine. Then Bizzarrini was commissioned by the Iso Rivolta organisation to develop a new chassis for the Iso Rivolta GT sold from 1963 to 1970. At the 1963 Turin Salon a shortened GT chassis was developed by Bizzarrini for the Iso Grifo A3/L with 327 cu inch Chevrolette Corvette engine and bodywork designed by Giorgetto Giugiaro. But the same Turin show also exhibited the Iso Grifo A3/C on a separate stand which was mechanically similar to the Grifo with a different lightweight body als designed by Giorgetto Giugiaro. The A3/C was entered for the 1964 Le Mans 24 hour race where it finished 14th after a breakdown, but took the class win in the 1965 event. The A3/C and A3/L had different bodies, and in the A3/C the engine sat so far back in the chassis that it was in the cabin. Bizzarrini fell out with Iso over his competition interests and the two parted company, with Iso continuing to see the Grifo whilst Bizzarrini took the A3/C and put his own badge on it; actually he had cheekily been puttin 'Bizzarrini ' badges on the A3/C almost since the start. Bizzarrini built the chassis for both cars, the Chevrolet Corvette provided the engine, and bodies for the Grifo were built by Carrozzeria Bertone and for the A3/C by Drogo. After the split from Iso, Bizzarrini branded his car as the 5300 GT and offered it as the 'Corsa' (Racing) and 'Strada' (street) versions. Later there was a 5300 'America' with fibreglass bodywork. Around 100 Bizzarrini cars were produced until 1969 when the production ended as the operation was not financially viable.
Bizzarrini 5300 GT Strada 1968 - badge on bonnet
Bizzarrini 5300 GT Strada 1968 - Badge on c-pillar
Bizarrini 5300 GT 1965. Renzo Rivolta and Giotto Bizzarrini collaborated on a Corvette-engined car that became the Iso Grifo and also the racing Bizzarrini A3C. Bizzarrini fell out with Rivolta and went on to develop the Bizzarrini 5300 GT Strada with a 5358cc Chevrolet Corvette V8 engine
Bizzarrini 5300 GT 1965. Bizzarrini developed the Iso Grifo A3L as the A3C ('C' for 'Corsa'), but from early on was putting 'Bizzarrini badges on instead of 'Iso'
Bizzarrini 5300 GT Strada 1968. Chassis No: IA3 0332. Powered by a 5354cc V8 engine from the Chevrolet Corvette and tuned to 350 bhp
Bizzarrini 5300 GT Strada 1968. Chassis No: IA3 0297. Powered by a 5354cc V8 engine from the Chevrolet Corvette. The body was designed by Giorgetto Giugiaro
Bizzarrini 5300 GT Strada 1968. Chassis No: IA3 0332. This has been converted for competition.
Bizzarrini 5300 GT Strada 1968. Chassis No: IA3 0332. Body was designed by Giorgetto Giugiaro. Underneath it shared the chassis from the Iso Grifo but the body was much different because the 5300 GT had been designed (as the A3/C) for competition.
Iso Grifo A3C 1965. The competition version of the Grifo A3L, later developed as a Bizzarrini
Bizzarrini 5300 GT Strada 1968. Chassis No: IA3 0332. Body was designed by Giorgetto Giugiaro, and most were built by Carrozzeria BBM on chassis shipped from Iso.
Bizzarrini 5300 GT Strada 1968. Vents on the bonnet side. On the A3/C original the exhaust pipes emerged through these and ran back along the side of the car. For the A3/L road-going version, later called the 5300 GT Strada, the exhaust pipes were kept inboard.