I'm not new to carbs, but I am new to Holley's and I'm pretty much starting from scratch.

My vehicle is a 1986 F250 4x4 standard 4 speed (3 speed with granny gear) with a 351w H.O. 210hp 340tq and it is bone stick (other than the carburetor).

The carb that was on my truck is a Summit Racing 600cfm Vaccum Secondaries. Summit is being very vague on the rebuild kit so I'm kind of weary of ordering a 56 dollar kit and paying shipping.

I have a Holley that I pulled off of a parts truck about 5 years ago. It was on a 1974 f250 camper special 390fe with a c6 automatic.

The list number that is stamped on the carb is (LIST) 6946-1

Basically the only usable parts are the throttle body, float bowls, air mixture screws, floats, base plate and that's about it.

Someone cross threaded the power valve in the Metering Block, the Secondary Metering Plate was cracked and junk. All the passage ways ect were toast.

Part number for the Secondary Metering Plate is 34r 2007b.

I've tried to do my own research and from what I have found is that Metering Plate is no longer available, that you can get a Secondary Metering Block conversion kit at just over 50 bucks including gaskets.

What all is involved in that?

My jets are toast, what size jets, power valve ect will I need for my motor? (Stock 351w H.O. 210hp 340tq)

Where can I find all of these parts for this vintage carb?

Is it worth the trouble of rebuilding ect or should I find another rebuildable core?

Thank y'all in advance for any information and tips y'all can give me.

 

the 6946-1 is for a 1976 Ford 390cu.in. , f250 , f350 camper with manual trans . If the summit carb only needs to be cleaned and renew kit , it would be cheaper , easier, and faster to do, than the Holley . If you don't like the summit , I would look for a correct carb for your application . Just way to many issues with the Holley.

 

Here is the best reference source I can give you....everything you ever wanted to know...

https://www.holley.com/support/resources/