Suspect it would have been done the way we did it. 1630 is actually pretty generously sized. Any grown man who is reasonably agile and not too broad in the hips or chest could do it. At 65 I fail on the agility test !
Some others like the Shay would be a good deal smaller. My direct knowledge is more of the UK than the US but I suspect it was much the same. Boys started at 13 and at that age you could be fitted into very small spaces that HSE would take a very dim view of these days!.