Has anyone been successful in removing the bunch of Alternator wires and running a larger single wire cable ex: 4 ga or 1/0 ga wire in place?

Trying to tidy up engine bay wiring. Already redid battery cable (now 1/0 ga) to jumper post (now 250amp breaker in engine bay) for added insurance.

Curious what others have done with this wiring to upgrade.

Still need to add thermo sleeving to keep wires from melting with new headers/exhaust system.

Thanks
Dave