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Old 02-03-2009, 01:29 PM
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1960 BelAir w/66 427 bbc 650hp
 
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Holley 660 center squirters

bought me a set of 660's that need the throttle shaft assemblies replaced. Someone ground down, off, the loop the controls the secondaries and rather than messing with it I either need to replace them or the baseplate.
Now Holley only sells the entire plate assembly for them HLY-12R4280-3AM
$159.99 ea, I need two, or I find another 1:1 baseplate setup that works with 660's.

I heard 650-750 DP will work. Is that true?

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Old 02-03-2009, 09:14 PM
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Yes you can replace the BP with one off of a 4777 - 4779 but you won't have the faster roller linkage. What you have is common on a 660 without enough converter or trans brake to help with a stumble or bog issue. I have dressed up a few pairs of them with the linkage on them and mounted to the intake. Look at the worst one and grind the other to fit after making a template.

I have a new 20 year old set of 660s on the shelf that no one would give me 400.00 for on Ebay so I will let them sit. They don't eat anything and if I need them they are here.

Hope this helped, Mike
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Old 02-03-2009, 10:59 PM
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Thanks Mike! Funny another Mike answered a Mike question LOL! They came off a jet boat and yup one is slightly off. I'll do the pattern and set em up and see what happens. They seem to like them on ebay alot recently so maybe another shot will get some funds.


thanks again!
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Old 02-05-2009, 10:34 AM
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One more question on the 660's. Mine has the bowl kits on them and I was wondering if there was any stock parts off other Holley's I could use to change them back to stock? I know there is a kit for the rear plate and tube but is there anything I could nab off another Holley?
I run a tunnel ram and the sideways stuff will add a few $$ to the project were if I run thenm inline I can use my linkage and some of the braided line etc.

thanks
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Old 02-05-2009, 08:45 PM
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The issue with them inline is to jet the rear carb you have to pull the front one off. The Enderle linkage is pretty cheap when you consider what you are getting.

The bowls and rear jet plate off of an 1850 will work but you will be backing up. Look at the price of the extra parts, gaskets and inline linkage and you will have the 3D linkage. I see it on Ebay all the time for less than 100.00

Mike
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Old 02-05-2009, 08:58 PM
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I run Carter AFB now on my tunnel ram and have the in line linkage and the lines. The 660's are for the strip maily unless I can tune them in like the AFB's and make them work for the cruises I do. The 660's I understand are made for tunnle rams so I am wanting to test them out see how they work. Looks like the 1850's use the 134-9 plate and I need a 134-12. Are those drill sizes on the old plates?
Appreciate the info! You can see the beast at www.tictoc.us

thanks

Mike

Last edited by Tics60; 02-05-2009 at 10:28 PM.
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Old 02-08-2009, 12:41 AM
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The jet plate is just that it has the jet built into it, if you get the ones off of an 1850 they will be a little small but you can drill them out if you need more WOT fuel. The 660s idle circuit is rich so you may neet to restrict the idle air bleed circuit in the metering plate with some small wire. But you will need to trial and error it. Make sure the bodies are flat so they seal up. I put them in my Bridgeport and use a fly cutter to skim the main body front rear and bottom where the base plate bolts on. Then go to work on the throttle linkage. You will be amazed the responce you will have over the AFB's and if you get the idle circuit lean enough they will drive fine.
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Old 02-08-2009, 11:16 AM
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thanks for the help Mike!! Really appreciate it!! Ran them through the carb dip twice and the sonic cleaner and dishwasher at the shop and man do they need allot of work Next is glass beading rewashing and then a bake in the oven. Then they will be clean enough to work on. I'll see if I can fly cut the block on the bridge port as well.
Any good older holley books on these 660's?

Also: what is done to the secondary metering block to convert the 660's to jets? I keep looking at these one's and all I see is a bit of solder on one of the runners. Can you use standard metering blocks or are they special ones? Mine may need to be replaced if I go the center hung route.

Last edited by Tics60; 02-08-2009 at 11:42 AM.
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