Yes, you're correct Tim, this isn't a stock set-up. My apologies for not clarifying that in the orig post. The entire drive train has been modified. Camaro front clip up front and I have no idea where the previous owner got the SBC, tranny & rear end from. I guess my question was just a general inquiry, not specific to a particular make/model. Should a rear end move as much as I described? Can video’s be posted to the forum? If so, I can try to take a real short one to show folks. Thoughts/comments? Thanks for your reply Tim! John