Kip,
Last year, Warren Foster & I put together the following pages for
1929-1962 stovebolt engines (Chevrolet in-line six cylinder engines derived from the 1929 194 cubic inch "cast iron wonder" stovebolt six). We have not yet made a set of similar pages for GMC in-line six engines from the same era but we could do so.
A few months ago, I think I offered these pages to Peg as a suggested Tech Tip.
Tim