Good News: I grew up in an Italian household, both of my grandparents came off the boat.
Bad News: Grandmom never made Carbonara. So my dad never asked for it as we growing up either. Spaghetti (all pasta for that matter - except for elbows) always, always, always had some sort of marinara on it.
That being said, pancetta is salt cured so I don't know that switching to it would bring any relief from the saltiness of the dish. If you salted your pasta water, cutting back on that may help.
BD