I have been looking at leaf springs to replace the worn out rears on my 74. What is the diffrence between a single leaf and a 4 or 5 leaf. Is one better than the other. The car will be a street driven cruiser, not a strip car. I noticed Summit has a good deal on their 4 leaf spings. Has anyone used the Summit springs? I have replaced the front suspension and now I need to do the rear. I don't want any drop in ride hight. Thanks for the information in advance.