I would go with the real AAR,those cars are starting to pull some real money. I have also heard of several T/As and AARs being reunited with their original blocks through the T/A.and AAR registries. They did make some 70 Barracudas with 340 engines. I would check the VIN,and engine block numbers, that car may be worth the twenty grand,if its a real 340 car,with the matching numbers engine. I would still go with the AAR though! The red slant six car is rusty,and those spots only get worse,once you dig into them.