My 1983 --
I have 47" "stop to stop" as the measurement in my notes. The track itself would be about 2 inches or so longer because the stops sit on top of the metal track itself. As I recall, the stops can be removed by pulling the pins straight up and sliding the stop off. (Just in case you were wondering!)The well the traveler mounts in measures about 58" by 2" to 2 1/4" depending on where you measure on the curve.