I used a power brake booster and master cyclinder from a 91 burb (donor vehicle) we extended the rod like this.........(I did not have the correct all thread we just used a bolt got these at Loews, I do not thing one has to have grade 8 for this application....JMO Kieth
http://kieth.smugmug.com/Trucks/66-G...5_tXS55Sq-A-LB