I used to have a 67 Camero with mono leaf and slappers, it worked very well. I was told by some and Lakewood that the mono could bend or possibly break the mono spring (I have seen some w/funky twists to them). While at a junkyard I was looking for something else, I ran across a new set of replacement multi leafs for $15. I snagged them, and while my diff was being built I had the builder weld on the multi pack perches. He also advised me this was a better setup than the mono. I want good hook up and don't care about street ride. Just wanted your opinions.