Picked up some 4 speed parts today, not really sure what I have. Amongst the pile are two different z bars. Based on my research it appears that one may be for a b body, and the other...no clue. Anyone know if I can use these for my 4 speed swap? I have the 10.5 aluminum bell housing, 360, 1971 a833. It looks like I can cut one down (hopefully to use) based on what I've read because it needs to be 7 inches. Am I measuring these correctly?