1965 Barracuda 273 rebuild...intake code?

The fender tag was not on the car when I bought it...figures! I'll just have to get inside it to see what I have. Thank you for the pictures showing the difference on the pistons! I also checked the Edelbrock carb they had on it and it is a spreadbore #1406. Had a spacer between the manifold and carb.
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The 1406 is a plain old Edelbrock AFB style carb. The secondaries are slightly larger than the primaries but it's not a spread bore.