Jean: 

I think this track is what you are talking about ... Pygmalion and other boats that had the rail installed at the factory - were thru bolted with a washer and nut on the back side. 

When I did the caprail reseal project, the port side was reachable enough to rebolt the track in place but the stbd side I followed Bud's recommendation and slide the track aft about 1" and then drilled/tapped and screwed in the ~20 5/16 NC SS flat headed philips machine screws. 

~5 years later both sides are holding well and I'd recommend to just drill and tap the track into place.  You may hit the 1/4" deck to hull bolts by chance (like I did) but with that many bolts in the track it hasn't been an issue.

Here is the FAQ on caprail resealing - inside the article is the info on reinstalling the track.

http://www.westsail.org/westsailFAQ?mode=MessageList&eid=491881#491881

Jay

Jean:  Thanks for the kind words and seasons greeting to you and yours -- I do hope to cruise up in your neck of the woods sometime! 

Jay