The beauty of a 914 is that you can do anything you want to do with it.
As a prior owner of a variety of LaDeDa Porsches, I can safely say that it is hard to devalue a Porsche that starts out with little comparative value to most others with the same moniker. Not Samille,,,,
So have at it / creative alteration is inspired insanity. We all learn from it.
The purist hate your ass. I say go for it. Punch holes where light has never shown.