If I was going to do a crawlbox ,Marlin is who I would be contacting . I wheeled with him in Texas and you talk about low gearing in his old red Toyota truck.
But as stated 4:56 or 4:88 gears and a front locker would make 99% of the people happy.
I had 4:56's double locked in my last 5th with 34's and loved it.
580:1 Triple Case Demonstration in a 3rd gen 2016 Toyota Tacoma - YouTube
Downhill with NO driver in a 2016 Toyota Tacoma - YouTube