I have power steering now, I converted my bus to a late bay steering box about 2 years ago but due to the steerring idler pin housing on my home built beam coming off I decided to go for power. It won't bolt onto a split and I don't know if it came be made to fit but you never know, people said late bay didn't fit early but I made it happen and now lots of others are now doing it.
Anyway if you want power steering I have some bits that do work on splits, i think moler and a few others have done my astray power.