03-31-2011, 03:49 AM
Brief Question and answer I found in a magazine I thought this might be useful info for someone down the line.
Q.) I have come into possession of a real gem, a 1971 Mustang Mach 1 with a 429 Cobra Jet engine. However the engine is missing. I have found a 429 with no top end. I have been gathering parts. The main trouble is finding the 4 barrel carb. The original was a quadrajet by Rochester. I am sure there is a problem with just grabbing any old quadrajet.
Can I save money by buying and modifying one of the General Motors to fit my Ford?
A.) You are correct sir. There is a problem with grabbing any old quadrajet from the late 60's or early 70's for your Ford. For GM cars, the throttle linkage is different, not to mention the screw in filter and kick down lever. Quadrajets were common in Chevrolet and other GM cars starting in 1965. However, Rochester did make a quadrajet for the 429 Cobra Jet in 1971. The difficulty in tracking down one of these carbs is Rochester did not take the trouble to cast a Ford part number into the housing. They simply used carbs already stamped with GM numbers. Isn't that peachy??
Since these carbs are basically a GM application, with the basic body you could modify to a Ford. However the parts require finding an old Ford version of the quadrajet. According to Pony Carburetors the casting numbers for the Ford application are 7040285, 7040286, 7040287, 7040288. The Ford part numbers are located on a metal tag affixed to the carb. These quadrajets do work well. The back 2 barrels are vacuum operated and large compared to the economy engineered front 2 barrels.
Q.) I have come into possession of a real gem, a 1971 Mustang Mach 1 with a 429 Cobra Jet engine. However the engine is missing. I have found a 429 with no top end. I have been gathering parts. The main trouble is finding the 4 barrel carb. The original was a quadrajet by Rochester. I am sure there is a problem with just grabbing any old quadrajet.
Can I save money by buying and modifying one of the General Motors to fit my Ford?
A.) You are correct sir. There is a problem with grabbing any old quadrajet from the late 60's or early 70's for your Ford. For GM cars, the throttle linkage is different, not to mention the screw in filter and kick down lever. Quadrajets were common in Chevrolet and other GM cars starting in 1965. However, Rochester did make a quadrajet for the 429 Cobra Jet in 1971. The difficulty in tracking down one of these carbs is Rochester did not take the trouble to cast a Ford part number into the housing. They simply used carbs already stamped with GM numbers. Isn't that peachy??
Since these carbs are basically a GM application, with the basic body you could modify to a Ford. However the parts require finding an old Ford version of the quadrajet. According to Pony Carburetors the casting numbers for the Ford application are 7040285, 7040286, 7040287, 7040288. The Ford part numbers are located on a metal tag affixed to the carb. These quadrajets do work well. The back 2 barrels are vacuum operated and large compared to the economy engineered front 2 barrels.
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