I knew somebody would ask about this. The 283/220HP L77 V/8 engine option was not available until the last 4-5 months of 1964 Chevy II production. It's shows as a January, 1964 revision to the GM Heritage Center site Vehicle Information Package and is listed in the 2nd printing of the 1964 Chevy II showroom brochure. I can't find any numbers on how many of these engines went into 1964 Chevy IIs, but I think they were quite rare.What about the L77 option? I have a 64 Chevy II 100 series wagon that is a factory V8 4 speed car that I have been accumulating parts for, to build as a L77 optioned car. I don't know if I will ever get to it.
Jerry in KY