The best replacement for overhaul is rebuild.

The best alternatives to overhaul are rated as following:
★★★★★  rebuild
★★★★  morroblivion
★★★  change engine
★★★  repair
★  rebirth
★  sounds of skyrim
★  rebuilt
★  skywind
★  morrowind 2011
★  climates of tamriel
  lush trees

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Speaking about overhaul, one probably shouldn't forget about tamriel rebuilt.

Other search terms related to overhaul and their ratings are:
★★★★★ tamriel rebuilt
★★★ enb
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Google Trends

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overhaul
rebuild
morroblivion