Is there anything that makes the car "special" ... probably not. Based on that I wouldn't worry about the 383. However, you can do up a 440 for the same money so why bother with the 383 ???

I'm in the same boat. What it boiled down to was the value of the car with original equipment versus without. Virtually no difference. So I building what I want today, not what someone else "might" want tomorrow !!