@TUME, for the Pittsburgh cars, you should also add a clerestory roof...
I toke some time during my brake at work to have a brief look at some pictures from the Pittsburgh PCCs at the internet. I recornized the different looking roof. Also it will reqire to get a completely different mesh at the roof for trolley pole versions and pantograph versions.
But please keep in mind that I will first finish the set of MUNI cars. After that I will do a set of older SEPTA cars. Thereafter I will do PCCs which require major mesh changings and additions in comparison to the basic mesh I created not which represents the MUNIs and the old SEPTAs.

Have a nice weekend.
Your's TUME