Having experienced the "Exploding radiator" first-hand, you are on borrowed time. There's no limping it home from anywhere when that happens.
Fortunately, mine happened 14 miles from home and I called my son to tow me home.
I've done most of your list under the hood to mine because they were all in need. When the radiator exploded, it bumped my schedule up a BUNCH, then I did the under hood stuff, then the axles.
Fortunately, I was already in process of gathering parts and my PO already did the HG at 145K (I bought it at 196K). However, a lot of the old hoses were reused.
I took me a month to gather parts, then two VERY full weekends and every night in between, to go through the complete cooling system, the VC, Distributor, ignition system, then front and rear axles and all brakes.
Make a list, prioritize, and do it based on need. Just FYI, including tires, rotors, calipers, radiator, all hoses, gasket, I installed about $6000 worth of parts 6 years ago. I did all the work myself (and my then 12 YO son...). Since then, I DD my truck about 15K to 20K per year and all I do is oil changes, tire rotations, and belts. I have put on 80K since all the rebuild and I'm finally getting to the point I need to start looking at another round of big maintenance. (I drove it for a little over 2 years before I did all the big stuff.)
Once I pulled the radiator, then everything under the hood became important because it's easier to get to. If you are CONFIDENT that the head gasket has never been changed, then, yes, you may consider it. With all the other systems improvements you are getting ready to do, you will see better vacuum and higher cooling pressures, o it may justify doing it.
Good Luck!!!
But change your radiator.....