I'm only adding my 2 cents to add info to the thread, the 283 in my '57 has the original 2G with the centrifugal/vacuum governor, the truck was available with a 4 bbl also. I put a minor kit in the 2G a few years ago and it has been reliable. The 2G is a manual choke, mine also has a hand throttle, it starts very quickly, the only complaint is a little hot soak trouble and of course great fuel mileage of 5-6 mpg.


1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy