250 I6 Stock Manifold help

[72Straight6]

Looking for a little help.

I recently bought my '72 C-10 with a 250 I6. The throttle linkage is attached to the current intake with some 'hardware store bracing'. I have been told I need an Intake Manifold that has a mounting hole that would be 'cast in' to the stock cast iron manifold; then I could attach the throttle linkage to this bolt hole? If you were looking at the manifold (installed) from the top carburetor view, the bolt/mounting hole would be on the side of the intake closer to the firewall.

I have been searching for several weeks, but have only found one that is selling for $200 (seems a bit high). Does anyone have any advice on how/where to find one at a more reasonable price?

Also, looking to find the 'intake attachment' to upgrade to a 2-barrel carb (from my current 1-barrel.

(side note - I am possibly going to switch out my motor from a 250 I6 to a 292 I6, but as far as I know, I am going to need these exact same parts for my upcoming motor project).

Thanks for any & all help!!

Joe

[CST10]

I see those pop up in the for sale section from time to time. There was one just recently. Langdon Stovebolt has the NOS intake and exhaust manifolds for sale at $175. Call mr Tom if you need one quick. He also has the 2 barrel carbs and linkage. Google Langdon Stovebolt and check out his site.

[Wrenchbender Ret]

I have one. I will snap a photo of it tomorrow & post it. There was several configerations of those.

[72Straight6]

CST10 - Thanks for all the info. I will check out Langdon's website, and I will scroll through the 'For Sale' section again. Not that I need an NOS, but if I'm going to pay that much, I'd rather have NOS than something that has been used & abused, not that there's anything wrong with that!

Wrenchbender - I will keep checking back to this thread to see the intake you post, or you can send me a private message. I appreciate you taking the time to do that

[Wrenchbender Ret]

The manifold. The surface to the head is clean. I will separate it from the exhaust. $50.

['68OrangeSunshine]

Originally Posted by 72Straight6

Looking for a little help.

I recently bought my '72 C-10 with a 250 I6...

Also, looking to find the 'intake attachment' to upgrade to a 2-barrel carb (from my current 1-barrel.

(side note - I am possibly going to switch out my motor from a 250 I6 to a 292 I6, but as far as I know, I am going to need these exact same parts for my upcoming motor project).

Thanks for any & all help!!

Joe

The 292 and 250 share the same intake and exhaust in stock form. So you should be OK. If, after you get the 292, you decide you want a 2 or 4 Barrel intake, the Offy 5416 is aluminum, but similar in configuration to the GM cast iron 1 barrel intake. The Offy will work with the stock exhaust. The Clifford intake will not work with stock exhaust.

The Offy intake does not have the pivot tunnel for the carb linkage bellcrank.

After 20-some years of working around a Rube-Goldberg carb linkage/ bellcrank --that would not give WOT to my Holley 390 on a '68 292 L6 -- I installed a '71-'72 gas pedal and a lokar cable that goes direct to the throttle carb lever. If you have a '72, you're halfway there.
I'm running an L6 292 bored .030 over, Crane 260H cam, Offy intake, Edelbrock 1404 500 CFM 4-Bbl, and Clifford headers in a '68 C/10 Stepside w/ SM465 and 12-Bolt Corp rearend @ 3.73.

[jimelfarm]

I would like to use an inline 6 in my '67 (everyone has v-8's) but was told they get poor gas mileage and cost more to rebuild. Any thoughts?

['68OrangeSunshine]

Originally Posted by jimelfarm

I would like to use an inline 6 in my '67 (everyone has v-8's) but was told they get poor gas mileage and cost more to rebuild. Any thoughts?

They get about the same mileage as the V8's maybe better on the 250. 292 is a work truck engine. It's designed for big torque and power, not economy.
Yes, L6 HiPo parts are more expensive, but a well-built L6 lasts longer than a V8, so it all averages out.

[jimelfarm]

I have a line on an inline with a casting number of 3850817. My info calls it a 230 or 250. Is there any way to tell the difference from outside the engine?
Would a turbo 350 or 400 be a good match for this engine? I'm not after a world beater here, just something to go down the road and keep up with the traffic.

['68OrangeSunshine]

The 230 and 250 look alike outside. The only clue might be from the "dress numbers" the digits stamped in the block on the machined pad aft of the distributor hole. The last 2 or 3 letters will tell.
Yes, either of those automatics will bolt right up to the L6 block, and work fine. The TH400 is heavier duty and will stand up to a BBC or towing. I had a TH350 behind a 454 in a 4x4 K/10 '67 Suburban, and it worked OK.