1965 Barracuda 273 rebuild...intake code?

Yes. Looks like you had a block change sometime in it's past. It will work just fine with the 315 heads and other earlier parts. Your VIN won't tell you if your car is a Commando car or not, but, the fender tag will. If it has a 31 under the AB, it's a 4bbl 273. A 30 under the AB and it came with a 2bbl.
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.
Edelbrock Carb 1406.jpg