Counterfeit Carter M6866 mechanical fuel pumps being sold on Amazon. Buyer beware!

Filters are best installed on the pressure side, not supply side.
No, not at all. That’s the exact factory setup. In fact there is a threaded hard line between the pump outlet and carb inlet. Parts book shows some generic diagram but that’s not for this one.

In fact, as mentioned,I bought this car new, have owned this car for 51 plus years.

Often a small filter is in the carb inlet on some different models