TUrns out that the genoa car track is bolted to either imbedded nuts or an aluminum plate in the deck, not to nuts on the underneath side of the deck. I was able to raise the track easily, although changing to another track would require pretty precise bolt hole placement. New track cars are on and look nice. If any questions, let me know.
Saginaw Bay, Michigan
"The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails." - William Arthur Ward