Here's a chart that gives you bores and strokes on many of the "modern" day motors. Note the differences between the Chev 307 and the Olds. http://atlas.spaceports.com/~1320web...s/engines.html

And here's one that is specific to Chevrolet engines with a few more data points. http://www.planet.net.au/~alexst/chev-spec.html