I had problems with my headers. Alot of these headers when made are fitted to 73 and up Idler , pitman arm and center link. This totally moves everything and allows better fittment in some cases. You may want to look at that option .Older designs fit the early models . I don't know why they don't explain this with the purchase . They are different from 73 and up so how can the headers be the same. Just some info you all may want to concider . Steve