[KULTULZ]

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HOLLEY introduced the H4150 in 1957.

HOLLEY designed the FORD 4100/2100 expressly for FOMOCO and was also released in 1957.

FOMOCO bought the 4100/2100 design rights from HOLLEY in 1964 and began to make several improvements over the original design.

The 4100 was last used in the 1969 model year.

Both CARB STYLES were introduced along with the HOLLEY DUAL ADVANCE DIST (1957).

The 4100 was intended as a lower cost/easier serviceability alternative to the H4150.

The 1957 MERC 312 used either the H4150 or CARTER AFB.

The 1957 LINC/MERC 368 LYB used the CARTER WCFB as the intake plenum was a square-bore design.

FOMOCO did not acquire AUTOLITE until 1961 so the 4100 was designated FORD until about 1964-65 when FORD assigned CARBS to its AUTOLITE DIVISION. It then became known as the AUTOLITE 4100.

The HOLLEY 4010/4011 was introduced as a street carburetor combining both features of the 4150 and 4100 (similar in appearance to the 4100). It had a few design flaws and HOLLEY dropped it due to low sales (aftermarket). HOLLEY destroyed all tooling.

The design rights were later sold and what you see now is the SUMMIT CARB – MADE IN CHINA.