I used to own a Lexus SC 300 which I thought was one of the best looking cars ever. Those cars are fairly cheap now since they are so expensive to repair so I've thought about buying one with a blown head gasket and turning it into a race car with a big block Mopar under the hood. It would be a huge project though and I just can't bring myself to pulling the trigger. I think a 440 in a new Challenger would be the same type of project. You would spend a ton of time and money to get it sorted out but I guess you would be the only one around. Starting with a drag pack car would be easier since they have already done most of the mods for you but of course, those are spendy.