My biggest regret was selling my Miata to pursue other cars. I should've put it away and come back to it later. For me personally, I dislike body kits except for the Italia. Add on bumpers or whatever with exaggerated features on a Miata doesn't do it for me plus all the fitment and finishing hassles just to end up with a 90s Taco Bell dated look is a big nope for me.
I like the V8 Miata idea but I would want to build it rather than buy it.