Should the engine be blue?
I read in Hemmings, and was also told by someone who has owned one since almost new, that all 383 67 Barracudas had blue engines and were 280 hp, except for the last few cars in the model year, they were orange and 325 hp, (and he has a blue engine).
The difference in hp was due to the heads, same as the 68s.
Mine has a coat of orange and blue, and it appears the orange was first, the car was built Wednesday May 31, 1967, (from my understanding that was near the end of the 67 model year), and the engine was built Tuesday May 23, 1967, (as the 67s don't have the vin on the block you have to go by the date it was built to determine 'matching numbers').
This is all what I have been able to determine, I am by no means an expert or even convinced this information is correct, but the auto makers did do some strange things in the past.