To play devil's advocate, there's no mention of "Commercial" in the 1949-50-51 Ford F-series trucks shop manual w/1952 supplement.
However, even as the telusplanet chart indicates, the color is deep red for "commercial" for 1950. The car's could be bronze, I suppose. The 254 L6 I have from a 1949 F6 is red, not dark blue or green. So I look at that chart with some hesitation. The Wagner letter I posted on FTE seems to be a bit more accurate to me, but still has me wondering overall. I would really like to see this all mapped out better than what that chart shows. Afterall, there's no acknowledgement between L6 and V8's in that chart. If a database can be put together, that'd be great.