scored two nos intakes on a W-31 and the other a Edelbrock o4b I tripped on the w 31 wasnt looking for one . The o4b I have been looking for a nice q jet multi bolt intake for 4 plus years . The shipping tag on the box ties me in so well to this I use to work with race horses and the Hurst came form the same area was the cherry on top

 

Sweet!

 

Wow, nice!

 

Very cool! I will trade you a nice rally pack for the W-31 intake

 

I trade you some cola....

 

I trade the tri-carb intake for the W31!

j/k

maybe

 

Its for my Numbers matching Rallye 350 sport coupe s four speed bench seat W-31 Cutlass . anyone know of the speed shop on the tag of the edelbrock ?

only intake trade i would do would be for a REAL 69 hurst intake , yes i would kick in a small amount for a clean one What would you guys think it is worth ?

 

One is silver, the other gold.

 

.....my cola.....

 

Do both designs of the W-31 intake have the same casting number?

Don W

 

Due tell more please

 

Thanks for the detailed answer Joe.

Don W

 

I think you would have to kick in a LOT of extra on that trade.

Last time seen NOS W31 intake- yawn, a month or 2 ago.

Last time seen used, any at all '69 H/O intake- many years ago.
Almost "never"

 

What is the date on the bottom of the W-31 intake? Is it a 74 date?

 

I would have to look . why 74 ?

 

Nice find!! Both are really hard to come by and many people dont realize what kind of torque you can get with the o4b! The W31 is really nice!

 

Nice score
Another informative thread cool info

 

Since I saw the post above about a 69 hurst olds intake, I know personally of one that sold for 16,500 dollars! Yes that was sixteen thousand. Last year in Tampa! Unbelievable.

 

I almost bought an O4B intake at homecoming a few years ago. I didn't because it doesn't work too well with HEI's

HAHA as I was typing this at work, my test results came back xx.442

 

That makes Chris' replicas a purty shaweet deal.

 

Oldsmobile did another run of W-350 intakes in 74 and sold them over the counter. Most if not all of the NOS W-31 intakes I have seen are the 74 dated versions and have completely different casting number than the original 69-70 production run intakes. Early intakes have casting #406114 and later intakes are casting #407571.

 

Always learning something new on this site.

 

Hi Shane, yes the Hurst Olds did spend many years in the Tacoma area, and may have even been sold new there. Did you ever have any luck tracking down the guy I bought it from back in '81 or so? Nice score on the intakes! I remember Doug's Racing Stables very well, bought some stuff there myself back in the 80's. It was the go-to speed shop for a lot of years, and many of the auto parts stores in the region bought from them, as I believe they were also a performance parts wholesaler. Very cool!

 

Thats great info Mark. No I didnt have any luck sort of forgot about it to.

 

Took some more photos it has a 74 date on it also has both numbers

 

Is the LD9 the date code joe ? I will have to look closer if I see a true date.

 

Good info Joe that clears up some questions I had!

 

I have also measured the ports of 3 early(69 dated) intakes and 2 of the 74 dated intakes. The 74 intakes have measurably smaller ports so apparently they made a completely new mold for the later intakes.

 

I wonder what the numbers are between the two as far as 200 early and 2000 latter mold ?

 

Joe, the 69 dates I have documented so far are:
8-8-69
8-11-69
8-13-69
8-16-69
8-21-69
8-22-69
8-27-69
8-28-69

I seem to remember some early September 69 date but did not get the date written down.

4-16-70

The 74 dates I have are:

11-19-74
11-20-74
Possibly 11-18-74 but was almost impossible to read.

I believe there are at least 2 70 dates but I can't remember what they were. I think Brian Trick might have the 70 date codes.

 

mine is 11 20 70 also

 

Joe, cool pics, added those dates and also found another date of 8-27-69 searching CO. I have the measurements as 1.95"-2.0" for the 69 dated intakes.

 

I once met the owner of a local speed shop who said he used to work at Olds in Lansing. He remembers sending truckloads of extra alimunim intake manifolds (W-30 and -31, not 1980s) to be melted down for scrap.

 

No doubt. I myself witnessed a semi load of brand new gold/chrome SSII 15" wheels come in for scrap.

Thanks, GM. I'll return that favor.

 

I don't know why but I just love new old stock, everything about it! And that Oldsmobile intake in the third picture is just a beauty

 

Lots of great info. There was a NOS O4B at homecoming. I think he wanted something like $400.00 for it.