That's why you do like I did. Buy a 2nd car to drive all the time that is bone stock and reliable.
What I would say to you about selling it is this:
Most people might "say" they would give you 7K for it, but that's a totally different story than trying to come up with 7,000 cash for it. A bank will probably not loan more than about 2,000 for your car so that would leave someone with having to make up the other 5. That's a lot of cash to come up with, especially since most people that the 240's are popular with won't have jobs that give them that kind of money. I would say you'd probably end up selling the car for 5-6 if you did well.
People don't realize that when you dump a ton of money into a car you won't get it back out. This is why I plan on just keeping mine. And if I ever did decide to sell it, I'd take the motor out and part out everything. You'd get more of your money back that way.
But I thought you built that car for 6800?