1965 Barracuda 273 rebuild...intake code?

2465315 273 1964-65 1.78 1.50
2532080 273 1964-65 1.78 1.50

all other numbers are 66 and newer, when they switched to 3/8 intake bolts and angle.
I never saw an 080 head. What did they come on, an export model?