I will probably answer my own question right here but comparing how many cars and light trucks they were making semis must have been thousands less in numbers and possibly losing money on each one? I wish I could compare one of the Big three big rigs to one made by an actual semi company and compare every aspect. I find it very interesting since I had no idea that Chrysler made semis along with Ford and GM until I saw a old medium duty one [not a semi] hauling strawberries through a field and after doing a bit of searching I found out that they did but unlike Ford and GM they pulled out of the market first which seemed to be in the late 70s while GM pulled out in 2009 and Ford is somehow still going. I could never figure out if Chrysler was smart or what but it also explains the reason that every rv after 70s was made on a Ford.
I just looked on wiki and it says the declining commercial market so better yet I wonder how Ford and GM survived that?
One thing I find interesting with Ford semis is that a lot of counties have them here as does Caltrans vs real semis now though they are getting replaced with Internationals instead but what was the cost difference if anyone knows/ knew?