428 Carburetor

[Tripower389]

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.Hearne]

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.

 

[Sicarius428]

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

 

[JB66]

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.