As a youngster working with the old man, we built many in the same fashion.
They were 1x6 rough sawn boards, ideally. Depending on the span we had, we sometimes had a board on both sides of the rafter and joist.
A few years later we started mimicing manufactured trusses and used gussets and 2x4 chords.
W-truss and Fick truss design was used.
I would write it up so it is noted, for you have no clue as to how many nails were used on the connections nor do you know exactly if the chord angles were placed and designed properly.
Stick building roof trusses is somewhat a thing of the past.
Mechanics of the trades is on the way out for that type of expertise.