They are pretty things to look at, which is why lots of Vincents are never ridden. I have no doubt your special Comet will see lots of miles soon.
Doing a custom Comet like yours or mine involves a lot of staring, thinking, fitting, and the use luck of the draw parts, and it comes together in your mind well before it sees the sun. I don't feel guilty about time spent daydreaming.
The result of all that is something almost entirely unique and your own, even when starting with the same basic parts, which is the reason for the tongue in cheek title of this thread. Besides, what else are you going to do with an orphaned Comet engine?