I just replaced all the rear suspension on my 68 with what was listed as oem replacement springs from detroit spring and although the car doesn't have an interior or a full gas tank it sits pretty high. The listed replacement spring for a 68 is a 5 leaf. The guys on here tell me it will settle down once the car is back together but I am thinking that one leaf is going to have to come out of those springs to get her back to where I want it.