I have a 2 or 3 of these carbs and there are no numbers stamped on them that i can find.They bolt to a regular quad intake.Everyone ive showed them to have never seen one.Local parts stores have no info either.Thanks

 

It didnt post the pic.nother try.

 

nother pic

 

Last pic

 

These carburetors are the old holley 4360 models. They are a Q-jet replacement for GM cars, and some Chrysler models.They flow about 450 cfm. If you need more info I have it.

 

i finally found a set of numbers on it.6R-5610b.All the info you can give me would be great.Thanks

 

Also known as the economaster. Primary bore is 1 3/8" secondary bore is 1 7/16". 90 cc fuel bowl. Regular holley jets will not work as these jets are metric. I don't know if this unit is still produced, but I think not.

 

How old is this thing.Dont sound too old if its metric.They still make kits for these things or are they even worth fooling with??They come factory on anything??

 

Intro to market About 75 or 76, as far as I know they were aftermarket only. I couldn't say if its worth the trouble or if they make kits for them. They might be a good carb for a V6 but that is beyond my knowledge base. If all you were concerned about was low rpm,and good off idle performance and mileage this might be for you. But I would say that for any performance use go with another carburetor of almost any brand 500 cfm or larger. By the way this carb appears to be mechanical secondaries. Good luck with your choices............Bill

 

Appreciate the help!!I'll keep these as long as i have room anyway just for the hell of it.With the way gas prices is going i might just try it on the 305 since its no speed demon anyway.

 

I had forgotten all about those things. Somebody had put one on the '66 Impala 396 that I got from my in-laws. I put it on the '71 3/4 ton truck 350 I had at the time just before I sold the truck, and put its q-jet on the 396.

It is the one exception you'll find to mechanical secondary carbs being double pumpers.