As far as I know, no 261's had Zenith carbs, they were Rochester B's, unless you have one that is an updraft model. One could have been transplanted from a GMC, though. The 261 uses the same bolt pattern as a 235 but bigger jets in the carb. Are you sure this guy isn't pulling your leg? You mentioned in another post that this was a babbit motor. All 261's were full pressure insert bearing engines. If it is post- '57 it will have a full flow oil filter with 1/2" NPT lines.


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