I doubt the problem is in the starter or alternator. If it was fine one day then not the next I'd be looking at vacuum leaks, plugged fuel filter, collapsed rubber fuel line, bad filter sock in tank, sort of things.
if I were to replace anything "just because" besides your list, I would add plugs and wires to the cap and rotor, plus all filters and pcv valve, and remove starter and alternator from that list. If it's working enough to bury the gauge to "+40" then it's working, and the ammeter isn't the problem either. But the ammeter is a common issue so I'd possibly do the bypass as a preventative measure.
also if it were my car, the egr would already be blocked off/ and all vacuum lines besides vacuum advance, brake booster (if equipped) and pcv would be in the trash can
leave what's left of that ccegr vacuum switch in the radiator , just as a plug.
