I just did some swapping of leafs on my cars.I took the XHD out of my 66 Dart race car,swapped in my sagging ones from my 68 Barracuda and added Caltracs with them.I put the XHD,s in the 68 which now sits just right.If I were you I would try the leafs you have in your altered,if they don,t work,put them back.JMO