I have a 440 in a '66 charger that had a 361 originally. Granted, a 383 can be built to have respectable power but as stated earlier, for the same amount of money you can have a 440 done that will out perform it. I'll always be loyal to the 440. The greatest engine, in my opinion, that can be purchased for a respectable price. If your friend has a 440 available go for it and he'll be very happy he did. If he wants it stock, which it doesn't sound like he does, then this what's the point of this thread.