I have a '50 3600 with the 8 lug wheel pattern and have installed a disk brake conversion kit I bought on E-Bay. It was listed for a '55-?? truck but was able to be installed on my truck with a small modification.
My truck had 17" wheels which cleared everything without spacers and I have now updated to a standard Chevy 16" wheel that also clears without a spacer.
I did update the tie rod ends to the modern type which may be the difference.
FYI, I also converted the rear axle to a more recent 14-bolt Chevy rear axle using the tech tip information found on this site.
