440 6-pack Edelbrock intake modification

[Ghostrider]

Hi All, I'm wondering if anyone has modified the Edelbrock 6-Pack dual plane manifold to remove the heat passage so it can fit with a flat Valley plate instead of the recessed gasket pan style?
I'm going to port match and tweak the manifold but would like to run the MRE Hughes Valley plate kit from Mancini
MRE - Hughes Engines - 1 Piece Valley Plate Kit
The heat passage sits low but isnt needed with my Trickflow 240 heads anyway.
I want something that looks nice and won't leak!

 

[Cranky]

Watching this one....I'm thinking there's going to be some cutting and rewelding.....?

 

[33 IMP]

You mean, like this?

 

[Cranky]

You mean, like this?

View attachment 1972439

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That should work lol

 

[33 IMP]

I was gifted this manifold as you see it.
It was a failed attempt at a concealed nitrous system (not by me)
I have considered a set of Chinese 4412 knockoff carbs for this (there is no way I'm paying real holley carb prices!) but for all the work and money that would be involved, even with dirt cheap chinese carbs, (basically for eyewash) I simply can't justify the expense, since I don't believe it would perform any better than a modern single four manifold and 850 dp, that I already have.

 

[33 IMP]

This particular manifold would definitely need some work, besides fixing the extraneous holes.
It has some pretty awful core shift under the carbs, carb throats aren't round, port openings are horrendous. .
But fixing all of that is part of decent prep, so no big deal, I guess.

 

[493 Mike]

Aluminum is very recyclable!
Mike

 

[Ghostrider]

You mean, like this?

View attachment 1972439

View attachment 1972440

View attachment 1972441

Yes, just like that I guess! Thanks.

More basic fix than I envisaged. Don't need the sneaky nitrous ports but that would certainly allow me to use the MRE Valley cover...

I can't see any downside to this except for potential resale in future which I don't care about.
I'll look into that mod and update shortly.

 

[33 IMP]

Yes, just like that I guess! Thanks.

More basic fix than I envisaged. Don't need the sneaky nitrous ports but that would certainly allow me to use the MRE Valley cover...

I can't see any downside to this except for potential resale in future which I don't care about.
I'll look into that mod and update shortly.

If this manifold were used with iron heads, some sort of block-off would would have to be fashioned. On an aluminum head, all that would be needed is to plug the nitrous holes.

 

[493 Mike]

If this manifold were used with iron heads, some sort of block-off would would have to be fashioned. On an aluminum head, all that would be needed is to plug the nitrous holes.

You could just use the Felpro gasket with exhaust port blocked.
Mike

 

[lewtot184]

Removing the crossover chamber with those heads is very doable. Go for it, but i'd do a clean cut and save the removed piece in case you want to weld it back on for iron head use.

 

[rickseeman]

Find a friend with a Bridgeport and have him mill the crossover off as in the picture

 

[33 IMP]

You could just use the Felpro gasket with exhaust port blocked.
Mike

Well, that would be some sort of block-off wouldn't it? Lol.

 

[33 IMP]

New holleys... about $2500
New (Chinese knock-off) 4412, Temu..... $130 ea.
Cut the back of the aircleaner flange off, three side hung bowls from an 1850, plug the bowl transfer port, mechanical throttle linkage and some fuel lines.
Custom aircleaner to cover the mess..... 1500 (rated)cfm. (Probably really about 1100)

 

[GTX JOHN]

In my experience, the 850 and a good newer single plane (Victor)
or even a RPM Air Gap has produced more HP than a factory 6 Pack
throughout the RPM range.

Also, I have heard terrible things about the Chinese Carbs.

 

[SlinktRR]

I thought the new holley 6 pack carbs are discontinued? I got a set from summit 3 years ago and they work great. Expensive yes but very well made. Not sure I would chance the knockoffs.

The Edelbrock intake on the other hand ..not well made.

 

[6PKRTSE]

I thought the new holley 6 pack carbs are discontinued? I got a set from summit 3 years ago and they work great. Expensive yes but very well made. Not sure I would chance the knockoffs.

The Edelbrock intake on the other hand ..not well made.

Yes, true on the costs. Took me quite a while to find my final 3rd outboard sixpack carbs for my latest 383 sixpack set up. I paid more for it just to get it than I have invested into my entire complete other 340 and 440 set ups for my other intakes/cars. Hell, my 1050 twin Dominator carbs aren't much more each.

 

[493 Mike]

I purchased a aluminum 440 six pack COMPLETE in 1972-3 for $50.00 from the mechanic in the stall next to me. He was also a friend, deceased now.
Mike

 

[TN Mopar]

Years ago I had a six pack manifold that had the center carb holes opened up like a single plane
then had a Nitrous bar inserted through the side and JB welded in place
(The bar was cut out of a spacer)
It worked pretty well for the previous owner according to him
But the carbs were from a 340 and never really worked well or consistent on my 440
I got frustrated with it and sold the whole thing for $500 around the year 2000

The current setup with the Thumper Billet Carb is by far the best I have ever had