Track used with 23-158 trolley

A handy person from NY says:
What guide track is used with Product Code: 23-158 tricycle trolley and can this product be used for a bifold door?

How much space/clearance is needed to install both; or the difference required between the door panel height and the door frame height?

My panel height is 79 inches and the panels are heavy. The frame opening height is 81 inches.

Thanks for your help.
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Mike from SWISCO responded:
Good Afternoon,

We do not carry a replacement closet door track that works with the 23-158. The 23-158 roller assembly is for replacement on a closet pocket door, it would not work for a bifold door.

Are you replacing old closet door hardware or is this new application?
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