Engine is pulled - 273 rebuild or replacement 360 crate?

First the car…..1965 Barracuda

09 30 65 build date
Block casting 11 5 1965
Assembly stamp on block B273 11 19
It has the 1965 heads with the narrow bolt angle

Does this make sense for an original block? Or is it a 1966 block due the B stamp and late casting and assembly date?

The engine was pulled yesterday. We’ve found:

2 bbl pistons (same as fender tag; currently running a Qjet with an Offy 360 intake)

Already .060 over, bores need to be honed. Are .080 pistons available?

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