need new steering shaft opinions and suggestions

[blazer2007]

I,m replace my steering column on my 78 2 wheel blazer and I need the D shape steering shaft.Should I change to a u joint style while I,m here or replace the rag joint. Is the u joint style that much better ? If I change to a u joint setup what is the best options.I see a jeep swap on u-tube but not sure if this is a proper way to do this.thanks