Without knowing the reputation of the shop that rebuilt it, it is very hard. If they replaced everything from the firewall forward(and did it right), no one will ever notice and the car should be straight. Check out SVPU.com. They are a local shop here and the only ones I trust with my car. Go to the website, click "SVPU Project Cars", and then "'03 Mustang GT ". This one had alot of front end damage, but it was fixed right. This also wasn't claimed on insurance, and ended up repo'd. The new owner had no clue it was ever wrecked, until he found the shops sticker in the dash and looked at the website. Low and behold, he found his car all wrecked. As far as ever selling it, you won't get near as much from a salvage title, and I also think you could find a better deal.