Grant,

That link is to an excellent time-honored 2007 presentation that Pre '68 Dave gave to/at a Puget Sound Region Vintage Chevrolet Club of America meeting/program.

Bob C,

The short vs tall side covers were different for USA vs Canadian trucks.

Far-Northerners have noted that short side covers were used on later Canadian 216s. Short side covers were never used on USA 216s - they were used on 235s, starting with the low-pressure 235s in 1950.