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Yeah, it would be. Shouldn't be too hard other than perhaps finding the ERD of that rim. You might have to measure it https://blog.flocycling.com/maintenance/effective-rim-diameter-and-spoke-length/#:~:text=Measure%20the%20length%20of%20a,ERD%20%3D%20A%20%2B%202B.
That's a tub rim though right? Not sure a 20mm tub track wheel is much use to anyone other than fixed wheel hillclimbers
Is the hub bust? Does the rim have sentimental value? Are you looking learn wheelbuilding?
If not: Sell road wheel, buy track wheel would give the least headaches.