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Can anyone tell me the part number of the primary metering block on a Holley 670 street avenger carb? I have a carb that's missing one and want to replace it. Thanks in advance

On my 87 Ramcharger, I put a cast intake and a new 650 Holley spreadbore on it. No choke since installing it in the spring. Cooler temps are setting in and am starting to need a choke. I tried using a Carter Thermoquad choke and making one from a 2bbl with no luck. Is there a specific choke...

So, on a 650 Holley spreadbore carb list 7004-1, is there a benefit to running the 2 stage powervalves over the standard single stage ones? They are discontinued for one. Holley claims they aid in economy. The one in the carb is fine, I was just wondering. Holley replacement PV is a 6.5. The 2...

So, tuning a carb with a spacer. Do you think a cast, spreadbore intake with an open spacer cause issues when tuning a carburetor? Mainly A/F and idle settings is what I'm wondering. If there is a gap between the carb and the intake would it cause an imbalance by one side bleeding over to the...

Holley spreadbore 650 on a stock 318 and has the stock #56 jets in carb and 9.5 PV, it idles best when the mixture screws are all the way in. Could it have too small of jets in the carb? Should I bump them up a few jet sizes?

For a stock 318 ramcharger, would a 2bbl sp2p intake be worth the effort over the stock intake? I'm contemplating on buying one for my Ramcharger like this one.

Is it possible to mount an Edelbrock AVS or performer carb on a cast iron spreadbore intake? Will one bolt on witb a thick mounting flange gasket? Just curious if it would work or not.

Hi all, I have a Holley 1850 600cfm vac secondary carb and I bought the secondary metering block conversion so I can change the jets in the rear. What jet size should I start with? is it 12 sizes larger than the fronts? I am running 68 fronts and I put 80 in the rear. It just feels like it is...

Ok, so I have a 650 DP 4777-3 holley that workes great, but I wanted bigger so I bought a 4779 body, transfered everything over from the 650 to the 750. It runs great; however, it whistles loudly at idle between 500-900 rpm. I checked several times for a vacuum leak and I do not at all. I used...