Well, I don't have shims and stuff, so will be happy doing it the way manual says. Car made it ok for 28 years with no race damage so far. I will set it for just a tad of play for the washer, as book says.
That old cotter pin seems too big though, I heard never use an old one so will buy new of course, but debating if I should get slightly smaller one. Had such a bad time sliding out the old one, not sure if it is normal. A new one will be very straight, so should solve my woes.
Big thanks, people.