Does this build sound legit?

Senna-F1

I will just add that if you are going to buy someone else's FI project, at least get one that is from a known kit. Stillen, AAM, Fast Intentions, BP, heck even GTM would be better than getting something nobody knows anything about. You can save a ton of money buying someone else's because the value of those cars unfortunately is horrible compared to the money put into them. Keep looking for something better maybe.