Need 65 Barracuda info ** Updated **

The current owner says he didn't replace the motor, and he said the previous owners son said it was the original motor. I know that people can say whatever they want, but is there a possibility that if this was a late production vehicle that they may have put a 66 motor in it? The sequence number on this one is 174303, which seems like a pretty high number. Does anyone know the production numbers for 1965?

What size are the intake bolts?? If they have 1/2" heads, the motor is a 65 or earlier, if they require a 9/16" wrench, it is a 66 and later! The assembly date of the motor is on the front of the block, stamped under the drivers side head! That, coupled with the casting date of the block will tell you when this motor was manufactured!