I just found out a couple of days ago by accident that the 63-65 Rivieras with power seats had trim that attached to the lower portion of the seat to hide the track and other things. I have read other threads and have a pretty good understanding of how they attach and interact with each other. I do have a couple of questions though. In the attached picture I have a couple of parts circled. Where does the piece circled in red go and/or attach on the driver's seat? The piece circled in blue attach
As stated by Tom T. and Tom M. the grain on the 63 & 64 pieces was the Seville grain pattern and the 65 was the Madrid grain pattern.
The differences in the years I was referring to were differences in the configuration of some of the actual trim pieces and the brackets that hold them. From trying to assemble the pieces for my own car, being sold the wrong pieces for my 63, disassembling my seat, disassembling seats from the other years and information I have read on other posts