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I am building a 350 rocket from 1977 and NEED HELP

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Old October 25th, 2019, 06:07 PM
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I am building a 350 rocket from 1977 and NEED HELP

I have no clue what goes here and i’ve asked everybody and no body can tell me what this is
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Old October 25th, 2019, 06:20 PM
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The tube for the hot air choke. It make a loop inside the exhaust crossover in the manifold. One end of the tube goes to a fitting on the back of the carb, the other end threads onto the choke housing.
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Old October 25th, 2019, 06:34 PM
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Originally Posted by matt69olds
The tube for the hot air choke. It make a loop inside the exhaust crossover in the manifold. One end of the tube goes to a fitting on the back of the carb, the other end threads onto the choke housing.

What do i need to buy that bolts in there ?
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Old October 25th, 2019, 06:59 PM
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The choke heater tube.
There may be multiple vendors who sell these; this is just the one that popped up on a web search.

https://www.ebay.com/itm/70-71-72-86...-/160904313091


You'll also need the two tubes that connect the heater tube to the choke thermostatic housing and to the air inlet on the top rear of the carb.

Last edited by Fun71; October 25th, 2019 at 07:02 PM.
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Old October 25th, 2019, 07:02 PM
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What year is the manifold?
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Old October 25th, 2019, 07:08 PM
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Originally Posted by oldcutlass
what year is the manifold?
1977
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Old October 25th, 2019, 07:10 PM
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This will provide you w/ the basic idea of the choke heater tube:

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Old October 26th, 2019, 06:21 AM
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Old October 26th, 2019, 06:44 AM
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Originally Posted by BSiegPaint
where did you buy yours from ?
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Old October 27th, 2019, 10:03 AM
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Originally Posted by Mikedeneen21
where did you buy yours from ?
Inline Tube on one of their eBay auctions. Search "Oldsmobile choke stove" and you'll find them.
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Old October 27th, 2019, 01:08 PM
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Note that passage is open to the exhaust. You need a gasket between the manifold and the plate that bolts onto it. The looped tube goes down into the manifold.

I ended up making gaskets using the stiffest gasket material from the gasket kit @ Autozon. Use Copper RTV. It can be tough to find just that gasket on its own, and the cheap flimsy ones can blow apart.
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Old October 27th, 2019, 02:50 PM
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FEL-PRO 72586

You should be able to get it from just about any auto parts store for around $3. Heck, even Amazon lists it.
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