Biuld worth-stock/clone vs protouring $$

What would be worth more done on a `71 Duster originally /6, stock looking clone/tribute style or modern street machine/pro touring type build?

being its starting out a slant 6 car you are gonna have to find the right buyer in any direction you go. it will never be a numbers matching 340 car so why bother building one that looks like a stock 340 car?