Yes, that's definitely the wrong carburetor. If you choose to continue to run it, adjust the choke cover to just barely close the plate with the engine stopped, cold and the throttle held halfway open, then wire 12 volts to the connector on the cover through an oil pressure sensing switch so the choke coil is only heated with the engine running. If the engine happens to stall with 12V applied to the choke, the valve will open prematurely.

Then make sure intake manifold vacuum is plumbed to the choke release canister, the round device visible at the lower left of your picture. That partially releases the choke plate once the engine starts, to prevent stalling from over-choking. Don't attempt to adjust idle speed or mixture until the engine is fully warmed up and the choke plate is completely vertical in the airstream.
Jerry

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