70 Chevelle parts
 

Isn't there a difference in a 1970 SuperSport (XU) frame and a standard 1970 Malibu frame? My 1970 LS-6 frame had XU stamped by the date and part number stamped in the side of the left rear frame rail. It was an Arlington 03C built car. Bill

No difference Bill,both used the XU coded frame.