In some of them, such as the Polo Grounds -- where it was also 280' down the RF line.
But, then, some of the old stadiums were band boxes, too. Like Crosley Field in Cincinnati.
Fact is that, on average, the average dimensions of a baseball park have been pretty much the same over the years.
But, how did that affect home runs? Were there more home runs down the lines, but fewer to LC-C-RC? It would be interesting if someone could do a sabermetric study (if the data was available). How many home runs would Ruth have hit if he played in modern stadiums?