switching from 68 to 73 will it work

feeling pretty stupid here, I have an manual gear box with small sector, I've read that all gear manual boxes to 76 had the small sector? so the pitman arm from a 74 duster should fit? then tie rod ends from a 74 should fit 74 center link and then to the other tie rod ends? my current pit man arm has the bolt under the k. in theory it should bolt together but with the different angle in the 74 center link will it affect anything? or is there a problem with the idler? has anybody tried this set up? thanks for all the great advice, bruce