3.90’s to 4.10’s is not worth the effort and not much of a gain. Hence my recommendation of 4.30’s or 4.56’s and the tire should be a 28”.
Brian Hafliger’s low trans first gear set swap is not a normally seen route, I do have to say I like it a lot. Since the ratio of the first gear will also act like you changed the rear gear out of the hole, where it really counts most.