I am reading my new catalog from Early Classic Enterprises (
www.earlyclassics.com) I received in the mail today. After looking at many of the aftermarket 6 to 5 and 6 to 6 disc brake conversions, it looks like ECE is very comprehensive in equipment choices. Additionally, it apprear the offer stock and drop spindles for '60-'72 Chevy/GMC trucks.
FYI-American Racing offers many wheel styles in the 6-lug pattern that comes stock on these trucks. Being somewhat of a purist, I prefer to stay with the stock 6-lug setup, especially since there are so many aftermarket options available for '60-'66 Chevy/GMC trucks.