Guest Posted January 24, 2001 Share Posted January 24, 2001 I have a `66 225 with a 401cu engine and I have a carb dilemma. The book calls for a 4GC carb on the 401, but I have a 4MC which is supposed to be for the 425. So either the manifold is either off a 425 or the 4GC and 4MC have identical mount plates. Anyone help clear this up??? Link to comment Share on other sites More sharing options...
BUICK RACER Posted January 24, 2001 Share Posted January 24, 2001 The 4GC, goes is for the 401, it has four squirters and the barrels are all the same size. THe 4MC is a quadrajet, 1st year, came only on 425, but some have swapped to 401s. THe q-jet has 2 little, barrels and 2 bigger secondaries, hence the intake manifolds are much different. Hope that helps.<P>------------------<BR>Roberta<BR>BCA TREASURER 2000-2001<BR>BCA PRESIDENT 1998-2000<BR>BCA VICE PRESIDENT 1997-1998<BR>WEBMASTER<BR>Director-Michigan Chapter- Gran Sport Club of America 1989-Present<BR>http://www.geocities.com/buickracer<BR>1956 Special 2 door Sedan<BR>1966 Wildcats<BR>1968 GS-400 Convertible 4-speed<BR>1970 GSX Stage 1<BR>1970 Skylark Racecar - 11.26, 118 MPH, 7/22/00<BR>1986 GN, 4800 miles Link to comment Share on other sites More sharing options...
Don McClair Posted January 25, 2001 Share Posted January 25, 2001 Just a question but have you checked the numbers on your engine. It is possible that that car was ordered with the 425. The car should run better with the quadrajet. Link to comment Share on other sites More sharing options...
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