HI guys,

I am happy to announce that I have finally converted to a GM HEI ignition system on my 1982 D150.. Very happy with the results. After adjusting timing, it runs great!!
running with a single barrel intake and a Holley 1945.

What next??
While installing my new HEI, I notices a small crack on my exhaust manifold.
So I plan on changing the manifold,,
Here is what have..
-slant 6 cast iron exhaust manifold
-headers
-2 barrel intake
-4 barrel offenhauser
-BBD carter from a 318
I am planning for a daily driver with some pep to it..

I have been following this thread and I like the Idea of a Weber 38/38 or 32/36..

http://www.slantsix.org/forum/viewtopic ... ight=weber

What would be the better combinations??
Thank you..

PS,,

I would like to use the headers and the Offenhauser,, would look very cool!!
But I am not too worried about looks..

_________________
Slant power!!!
At least I try...

ok,, no answers..
Let me rephrase my question..

How does this sound for a daily driver 1982 D150??
HEI
Headers
4 barrel offenhauser intake
Weber 32/36 or 38/38

_________________
Slant power!!!
At least I try...

I would go with the BBD as long as it is in good shape and as lng as you fabricate the adapter necessary to allow the choke to work with the slant six choke thermostat. The BBD is a factory item and will be easier to make work with things like throttle lnkage, kickdown linkage, and an air cleaner.

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Casually looking for a Clifford hyperpak intake for cheap.

headers would be ok?

how about intake?? super six 2 barrel, or the offenhauser??
I know the 2 barrel would be easier, (work wise), but which would perform better for a daily drive..

I don't know how to choose the right words for my questions,, but I would like to know the performance advantages/disadvantages of headers vs stock exhaust manifold, and advantages/disadvantages of a super 6 intake vs the four barrel offenhauser for a daily driver..
I am looking for as much pep as possible for a daily driver..

I am not afraid of the work, and I have the parts to make any of these combinations work...

_________________
Slant power!!!
At least I try...

The way you previously described your use of the truck I would use the 2bbl on the iron intake with a good stock exhaust manifold and a 2.25" exhaust system. If you later want a Weber I would use it on the 2bbl manifold.

To do the best job of bolting a 2bbl to the Offenhauser manifold you'll want the Clifford 2bbl adapter and will want to cut out the top of the Offy intake to make it open rather than having 4 holes.

_________________
Joshua

I would not use headers on a street driven slant six.

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Casually looking for a Clifford hyperpak intake for cheap.

HEI yes. Headers? No, how about a Dutra manifold instead? Well built and you get to keep the carburetor heat. Plus they don't rust out like headers. A good 2 bbl is good for the street, and the Weber is best IMHO. But don't get headers.

Been down that road before.

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If it was easy, everybody would be doing it.

got it,,, No Headers!!
Don't know why,, but I will not go with headers..

Shame,, I have a perfect, in very good condition set..

So,,, where or how do I go about getting a set of Dutra??

_________________
Slant power!!!
At least I try...

Headers are not good for a street vehicle mainly because headers eliminate the heating of the intake manifold. You can contact the manufacturer of the Dutra exhaust mainfold here: http://www.dutra.org/doug/doug-sl6-exha ... -duals.htm

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Casually looking for a Clifford hyperpak intake for cheap.

Tube headers might perform reasonably well as a daily driver in Tijuana, but cast iron is a better long term choice for me. Headers performed okay in south Texas summers but they will generally need more attention.

If I understand correctly, headers are not good for a daily driver because they lack the heat to the carb. I understand this is important, specially in cold weather. Yesterday gave us the coldest weather we have seen all year, and this was only in the low 50's.. I also understand that the heat provided to the carb is not just for cold weather..

My heart is not set on using the headers, but I do have a cracked exhaust, a spare exhaust that needs to be resurfaced, and a perfectly good set of headers.

So, to popular advise, -headers are eliminated...

Now, cast iron two barrel intake, or aluminum offenhauser intake?

Keep in mind I already own these parts, plus the adapters needed,, no need to purchase anything..

_________________
Slant power!!!
At least I try...

With the factory cast iron exhaust manifold you can keep an automatic choke without having to buy an electric one. The engine warms up faster and drives better in cool weather. It's more durable than headers and is less likely to leak. I once ran an unheated Clifford manifold with an electric choke Holley. It required regular fiddling and warmed up slowly.

_________________
Joshua

Official,, Headers are eliminated..

_________________
Slant power!!!
At least I try...

It's not that we hate headers; I ran them for a couple of years and aside from taking longer for the engine to warm up, they required constant retightening and were louder. But they did provide more horsepower. I just didn't like having to tighten them and repaint them all the time.

As for intakes, I like the good old fashioned factory cast iron 2 bbl super six intake. I had the aluminum one but it was porous and caused vacuum leaks.

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If it was easy, everybody would be doing it.

I ran a set of Clifford long tubes on a PS-equipped 65 Dart GT with a Clifford 4 barrel intake from 1984 through 1990 and it was my daily driver. I live in VA where the temps can get downright cold in winter (mostly 20s-30s). I would pump the gas twice and it would fire right up. Let it idle a few minutes and I could drive away with no stumbling. Maybe I was the exception but I never gad any problems with lack of carb heat.

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65 Dart station wagon slant 6 - now under construction
47 Dodge Custom 4 Door sedan
87 D100 Short Bed slant 6

Retired USAF 1966-1986
Retired US Postal Service 2004-2014