Sorry it's been a while but we wound up going with an off the shelf kit from Summit and with some modifications the ole wrecker has power steering. It may not be perfect but it sure beats trying to muscle a turn in a crowded spot.
https://www.summitracing.com/parts/CLP-CPP5559PSKOCAs for the badging Mike B that's what I've found too but I'm told it's a 58 so it's a 58. There may have been a 2nd truck because the original that was found in 2010 has the platform body like the 62/63 pictures.