1st, don't expect to be amazed with 3.0. From a quality perspective it is usually just upscaled 1080p 59.94 fps. Each local station is different (the whole thing is still kind of a science experiment for them it seems sometimes) but in my market prime time shows look slightly better than 1.0. Sports however has tons of artifacts. Your experience may be different though, depends on the market.
The channel numbers will be 100+ their equivalent see my screenshot below. 43.1 and 143.1. Also note how you have to map them to their 1.0 equivalent.