I've read excellent things about the Early Classic Enterprises kits from guys who have actually installed theirs into '64-'66 trucks.

They have all the pieces and it has been reported that their tech support is very knowledgeable and helpful as well.

http://www.earlyclassic.com


They are not cheap, but I have not yet read about bad quality pieces from them.


This is a thread you may find interesting:



'60-'66 Disc Brake Conversions


-W