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.

 

What's wrong with the Summit carb?
$60 isn't bad for a quality rebuild kit.
More that likely Holley makes them for Summit anyway.

For sure, I'd rather go that route than deal with a completely f'd up 40 year old doorstop that's going to cost you more than a new Holley to make right.

 

Amen! At least with the Summit carb you are reasonably sure that all the parts are there. With the Holley you are piecing things together and that's not always easy given the number of options with a Holley.

 

What model Summit carb is this?

If it's the 8600 (copy of the Autolite 4100) then Matthew can share experience with the one on his 351 truck.

 

Summit Racing carburetor part number M08600VS.

The rebuild kit part number is SUM-M08600-RK.

The problem is there's no parts descriptions and I refuse to shell out money for something that I have no idea what I'm getting.

I have emailed them about a parts list for the kit and I'm waiting for a reply.

The carb was stopped up on the back two barrels, I got it clean and flowing again and need gaskets pretty much.

 

I googled your part number and this came up.

http://static.summitracing.com/globa...m-m08600vs.pdf

Looking at it, it looks like a copy of the old Ford motorcraft "cracker box" carbs of the sixties.

Your kit probably has the standard stuff, gasket, o-rings, power valve, and a few clips and e-rings. You won't get the floats or anything serious like that.

 

I always thought Ford started Motorcraft in 1972 when the feds made them sell off Autolite?

At least that's what my concours Mustang and Cougar buddy's used to tell me.

 

I'd wondered about that. So, I searched and Wikipedia seems to think you are right:Not that Wikipedia is always right, as we know it isn't, but maybe this time?

 

THAT explains why Autolite plugs are such crap now!

Good find Gary.
Thank you!

 

I thought you'd like that. Considered highlighting FRAM, but wanted to see if you'd catch it.

 

Let see orange can of death and plug boxes that are orange IIRC


As for the carb I would have to go with what others say and stay with what you have and that is coming from a Holley guy.
The Holley needs much more work and it still may not run right.


Also as said the kit has what is needed to take it apart and put it back together,gaskets, O-rings, power valves if used, fuel inlet valve & seat and a few check *****.
Look at the cost of Holley kits.
Dave ----