Buy a 4 dr sleeper valiant or not?

Had a great offer to buy my friends 68 Valiant. Heres the lowdown. Its got a new 360/380 hp longblock with newer heads, nice intake, hookers, all new good quality parts, mild 727, 3:91 SG 8 3/4, all new suspension front and rear, large pattern brakes, body is super clean and interior is very nice. Here is the problem, its a 4 dr car. The same motor went 13.30s in his 67 Coronet with a 3:23 open diff. I am sure this thing will run well into the 12's. Price is right and the car honks. I am having these twisted thoughts of buying the thing, running a quiet exhaust and leaving the dog dishes in place (oh yeah, its pale yellow also) just for shizits and giggles. He is moving and wants to get rid of the thing quick....should I do it or not? Its a sweet deal that is hard to say no too, but a 4 dr?

Adam, you might know the car, he is also from Danbury.