Reply to "engine number"

> Denis the design of the 4 barrel Auto lite carb, original to Mangusta was
> sold by Ford to Holley who improved it and sold it as a Holley invention.

No. Though the magazine articles of the period list the Mangusta as
being equipped with an Autolite 4 barrel, the carb pictured is a
Motorcraft 4300 square bore carb. Ford originally equipped the 289
with an Autolite 4100 4 barrel carb but the '67-'68 J-code 302 came
equipped with a 441 CFM Motorcraft 4300, as shown in your picture.
The Motorcraft 4300 was also used on '70 to '71 351C's, though in a
600 CFM size. A 715 CFM spread bore version was also introduced in
1971 and was used on subsequent 351C-4V engines. The Motorcraft 4300
series carbs share nothing in common with the Holley 4150/4160 and
related tuner carbs. The Autolite 4100 is well liked as a simple
and reliable carb. The 4300 is not as well liked.

Ford did develop the annular boosters often used in Holley and tuner
carbs. These were introduced in the Autolite 4100. Ford also had
special versions of Holley carbs such as the 735 CFM 4150 used in
428 CJ applications. That Holley used Ford-designed skirted truck
boosters. There were also later Ford Holley 4180's with annular
boosters.

Holley hired the designer of the Autolite 4100 to design a new carb,
the Holley 4010 (and 4011 spread bore) that was essentially an Autolite
4100 that used Holley tuning parts. However, they subsequently dropped
the carb and later sold the design to Summit Racing which produces the
carb in China and sells it through their speed shop catalog.

Dan Jones