[FerrariTruck]

Hey guys i need your help. I bought this carb at the junkyard for like $25 bucks. It looks real good and well the holley/spreadbore combo is what really had me sold. However I have no clue to what model, cfm or even type of choke on this carb...ALL input appreciated.......

 

[blubu]

Hey guys i need your help. I bought this carb at the junkyard for like $25 bucks. It looks real good and well the holley/spreadbore combo is what really had me sold. However I have no clue to what model, cfm or even type of choke on this carb...ALL input appreciated.......

spead bore POS NEED LIST NUMBER TO ID IT

 

[RixLS6]

Need the List number off the front of the choke air horn to help determine the cfm etc.

 

[FerrariTruck]

ok i see lots of stampings....

how bout this---- " LIST-7002-1"
"1928"

on the base perpendicular to the air horn i also see this num "5071

 

[dyno jonn]

Hey guys i need your help. I bought this carb at the junkyard for like $25 bucks. ALL input appreciated......

Any chance you can get your money back?? :noway:

 

[davewho1]

Model 4175; 650 CFM; vacuum secondaries.

 

[Keith Tedford]

I had a 650 spreadbore on a truck years ago. Power was good as was gas mileage. This seems to be the exception. The carb restorers don't have much good to say about them. I have another one to try on our mild 350 el Camino when I have the time. Hard to beat a nicely set up Quadrajet for smoothness and all around performance.

 

[seventychevy]

Go to holley.com and click on "Catalogs" then click "Avenger Systems & Carburetion" it will then load the catalog... go to the end and back up to page 114. The carbs are listed in numerical order and it gives all the specifics for that carb- model, cfm, jets, etc.

Eric

 

[FerrariTruck]

Thanks for the info guys. I'm planning to use this on the 454 i'm putting together right now. I think it should be fine but I havent been around long enough to understand why this isnt a good carb... can someone further enlighten me??

 

[Jimmy P]

These carbs work JUST fine. They're different from the standard run-of-the-mill Holley, so instead of understanding the differences between a spreadbore and the regular square bores, It's easy for the shade tree mechanic to say, ' Those things are junk!'

I've run a few before with -0- problems and got good performance and gas mileage. It would be worth it to buy a good Holley rebuild book to understand more about carbs.....period.

 

[TrooperY2K]

Alfred, these carbs were a great swap for the underestimated Q-Jets back in the day. I rebuilt a lot of these spread bores (mostly trucks and boats). The kits are still available at the parts houses. Be aware that the plugs on top of the fuel bowls, where the fuel passages are, are prone to leaking. Some fuel proof epoxy will solve the problem. I hope you have access to compressed air. The real fine passages in these carbs need to be free of any dirt or "junk" that may have lodged in them. If you have not rebuilt a Holley before, take Jimmy's suggestion and get the Holley book. Good luck and have fun with it. It's worth the $25.00 just to see what makes it tick. :thumbsup:

 

[FerrariTruck]

thanks you Dave and Jimmy. :thumbsup:Thats just what I figured. I didnt think their would be anything wrong with with design. Hell the way I see it for a car thats gonna be daily driven the spread bore is the way to go. Any good recommendations on a book, or place to get the rebuild kit.?