Billy, as one who has been rebuilding and restoring vintage/classic Triumphs for over 30 years, I'm not sure what the issue is but perhaps I'm just missing something.
Back in the day many modified the Triumph and BSA vertical twins but so many of the mods done were terrible, turning them into hard tails, extending the front forks, and a host of stupid stuff that ruined their superb handling along with their value.
The classic Brit bikes value is determined by how close to original condition it is. To me they came off the assembly line as near works of art and beautiful machines. I look at the ax job modifications now and cringe, not giving a rats ass about what the guy doing the ax job had in mind, nor his legacy.
We modify our bikes to make them perform and handle better, not ruining the value of our machines in doing so. Bad analogy to me.
To me there is no such thing as "just another Bonnie". Their legacy is that they are Bonnies and sticking a single carb TR6 head on one is just plain goofy.
Just my thoughts.