Not sure how much use it would be, but look at this post HERE.

This should link to HERE, where you can change tracks, and get X and Y coordinates.

However, rather than these coordinates, for drag you may be better off knowing the node number (an imaginary line across the race track).

You could use an existing InSim called LFSLapper ("lapper") to get Zones (X and Y coordinates) or Nodes.

For an explanation on difference and how to use commands to find the Nodes or Zones, look at this post HERE.

Also, if you search the lapper section of the forum, you'll see that there is at least 1 drag script that can be used.

Few years ago now, but I made a drag layout on Blackwood - see HERE - which may give you an idea of how to arrange your drag strip.

Quote from ISRM readme :

Q: How do add a drag strip to an existing track?
A: You need to add a line to tracks.txt: [track]'[x1]'[y1]'[x2]'[y2]'[dir]
[track] - BL1, AU3, etc.
To get [x1],[y1]: position your car on your new start line in the leftmost part of track and type /i position.
To get [x2],[y2]: same for the rightmost part of track.
[dir] is 1 or -1, depending on the start direction.

LFS Polygon