"The small-block Chevy is unquestionably the dominant domestic ... 327's engine block casting (4.00-inch bore) with the 283's crankshaft (3.00-inch stroke). This engine was built for competition ...
The biggest first-generation SBC displaced 400 cubic inches with its 4.125-inch diameter cylinders and 3.750-inch crankshaft ...
In the case of the 383-cubic inch stroker, engine builders would modify crankshafts designed for the 400-cubic inch small block Chevrolet V8 and place them into modified 350-cubic inch Chevy blocks.