No! The leaf springs of a 300C are NOT THE SAME LENGTH as those of a 300D. Offhand, I can not remember which way it went but there is a few inches difference between the C and the D. Don't ask me why the engineering change but it is there. I had a broken spring on a C several years ago and a D parts car. Could not believe the struggle I was having putting that D spring into the C until I laid the two down together and found the D was a different length. End of swap. Had a spring shop repair my C originals. My expectation would be that the D and E leaf spring lengths are the same, but the C is unique. Wayne -----Original Message----- From: Gary Nelson [mailto:Gary@xxxx]