I read in a post a while ago (that I can no longer find) that instead of swapping in a whole 2WD steering box when you go crossover, you can just swap in the 2WD sector shaft. #1. Is this true? The 4wd box on my truck now is in good shape so I'd kinda like to keep it. I've had some badly done rebuilds in the past, I'd rather not go that route. #2. If so, where can I get just a sector shaft? GM won't sell me one. Would NAPA or Advance or someone? 2WD fullsizes are rare around here, and near impossible to find with any parts left on them in a junk yard.