Stupid Ground Question

I don't believe there was "change" from one place to the other. The battery ground to radiator support was added around 1970. The ground firewall to engine block remained, at least in every up to 75 that I have owned. That firewall to block jumper was pretty much the only ground path for the headlights, etc., for previous models. Dang long way around too. The added jumper from radiator support directly to battery greatly shortened the front lightings ground path.