Since your goal is to flip the car, the answer is completely different than if you going to keep the car.
As far as I am concerned, any modification that is going to make the car more reliable is a good one to make. If a small change is also going to make the car look better then I think that is good as well, especially if you have the original parts to go with the sale of the car.
Or course, If you were going to keep it, I say do what you like. I could care less what other people think of my modifications, abomination or not. I do not care about resale value for my car since I do not plan on ever selling it. HOWEVER, If I were to buy a car to sell, I too, would be careful on the changes I would make.
I have seen your other cars, I do not think that any changes you make will be an issue since you do high quality work!
Take care, Scott
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