Replacing the factory-original hammer and trigger on a 29 of this vintage with another one of each, of the period but different configuration, is an easy task. It is also reversible.
If the gun is going to be used, why shouldn't the owner make this minor change, to suit his needs/wants?
The front sight configuration is a little less friendly to reversible, but again, why not? Personally I don't appreciate the typical gun show front sight insert job.