Seems like parts from certain years don't fit on other years, even if same models.. So.. Figure I'd ask if 07 Road King 16" spoke wheels will easy fit/bolt right up front and rear before I goes to tearing up a perfectly good running stock 07 Superglide.
If not, which model part numbers would it take to put a 16" front runner

 

It will fit up front if you replace the triple tress with a set for a Fat Bob, FXDF. You will need the 1 inch axle from a Fat Bob or an Electra-Glide (same part). You can reuse the axle spacers, brake rotor and caliper.

Some later 2007 Road King rear wheels have a "Rear Isolator" attached with the large rubber shock isolators in it. It is removable on 2007 only if it is there at all, it is on all wheels for 2008, and 2009+ is a totally different wheel. The 2007 hub width should be the same as your Dyna hub but I cannot say for sure. The RK wheel will also only accept a 140mm wide tire if that is an issue for you.