my step dad has got his 68 truck with the stock drums on it and we want to convert it to 73+ 8 lug disks up front whats the deal with ball joints and stuff and part numbers would be great. we want to get 2.5 inch drop spindles at the same time. i have seen stuff for 5 and six but not much on 8. how do things match up and cross over. thanks for the help guys! 'preciate it