Help!!!!! How To Separate Buckets Seat Tracks

I did a set from a B body that way. Drill out one of the rivets to disassemble. Be very careful not to damage the nylon cage that captures the rollers as they are not available anywhere unless you cannibalize another track. Then use a small bolt and nut to replace the rivet. The rivets not only hold the track halves together but they also act as the stops for the rollers and tracks.