...these days, so I will tell what I know. A 1.12 4100 is way over carbureted for a SBF. The jets sizes are not the only issue that determine the suitability of a carburetor for a particular motor size. Aside from the booster sizes, there are ports and passages in the body castings that you cannot alter.
If you read back for a number of postings, you will see many statements on this subject.
Be that as it may, you should post the carb number (found on the left front mounting foot, and someone could tell you what the carb was intended for.
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HAVE A NICE DAY!!!!