428 Carburetor

T

Tripower389

New Member

May 5, 2005

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May 5, 2005

#1

• May 5, 2005

• #1

Hello out there. Asking a question from Norway. I have a restored 1970 GT500. When it was restored they put on a Holley 600 on the 428. I think this is the wrong carburetor for this car. If i'am not wrong it should be a Holley 735 put on top of the 428. My question is: Does any one know what that carburetor was setup with regarding primaries and power valve?

 

D

D.Hearne

New Member

Sep 29, 2000

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south louisiana

May 5, 2005

#2

• May 5, 2005

• #2

A 600 cfm carb on a 428 is WAY too small. Ought to be enough vacuum there to open the secondaries at or just above idle. A 735 would be a better choice.

 

S

Sicarius428

Active Member

Jan 6, 2004

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May 6, 2005

#3

• May 6, 2005

• #3

The 735 is what came factory I believe... at least for the Cobra Jets. Holley use to reproduce them but I can't it on their website. Then again its been a few years since I have checked. Check ebay or some internet retailer may have some on the shelf somewhere.
Kevin

 

J

JB66

New Member

Aug 21, 2004

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New York

May 6, 2005

#4

• May 6, 2005

• #4

Can you give me some specs on the car? I have the 1970 Ford Service Specifications book. It lists the 735 cfm Holley as Ford # D00Z-9510-AA, AB, AC or AD depending on auto trans or manual and A/C or not.