198ci

RaniDart70 said

I checked the displacement on the block rail right behind the alternator. All three were "B" codes on the vin and all were 225.

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Fair 'nuff. Remember, "B" was the VIN code for a 225 engine in '66 through '69; the 198 was available (and was coded "B" in the VIN) in the '70 through '74 model years only.