Way back in 2010, a guy from Texas managed to put a V8 in a Crossfire coupe. This was an early conversion and he could not make the starter engage with the key, so there was a hidden starter button under the sea. The car had vastly upgraded brakes and would stop as well as it would accelerate. He took me for a ride in it at the Dragon that fall. The car was amazing. He had paid around $10,000 for it a few years before and put $3500 in the brakes (parts only, did it with his own labor) and again, he put a low miles Mercedes V8 in it.

Not two years later, he offered it for sale. It sold for around $10,000 (and I almost bought it). You will NEVER get the money out of the car that you spend on mods. The story of Howard Carter's super-awesome-modded SRT Roadster is an even better example of that fact. If the money is important to you, don't spend it on mods.