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#1 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Which choke thermostat?
Hi guys! First post! I've got a lot of great information from you guys on this site so I'm hoping you can help with this.
I got my '69 Chevy SWB about 6 weeks ago and the PO said it was a 327 (but I haven't yet found the casting numbers to be sure). It came with a Edelbrock that wasn't quite right so I replaced it with a rebuilt Quadrajet (7028282) from LMC. Question is what choke thermostat do I look for? TruckAndCarShop.com says they have one for a '69 327 but does this photo look to you guys like that's what I have? Any help would be great! |
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#2 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Re: Which choke thermostat?
Welcome to the 67-72 Chevy Truck board from West Michigan!
Your manifold is from a newer Small block so the 67-72 truck chokes won't work. Here is a picture of a choke that is similar to the truck chokes. Also, note the difference between the manifold in my picture and the manifold in your picture. Jim
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1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC |
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#3 | |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
Quote:
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#4 |
Proprietor of Dale's Corner
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Location: Vacaville , CA
Posts: 16,080
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Re: Which choke thermostat?
You will probably need to switch to the older style manifold since you already have the older style carb
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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#5 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
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#6 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
Anybody have a guess as to what year that manifold would be from?
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#7 |
Active Member
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Location: Centrally located between Houston, Austin and Waco. BCS area.
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Re: Which choke thermostat?
I have an intake like yours that came out of a '75 350. I'm using a carb with an automatic choke I already had.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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#8 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
THANKS! That looks exactly like mine! I've searched quite a few times and could never find a photo that would show one like mine or if it did, it didn't say what it was from.
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#9 |
Active Member
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Location: Centrally located between Houston, Austin and Waco. BCS area.
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Re: Which choke thermostat?
If you post the numbers on the scraped off area on picture above in front of passenger side valve cover, we may be able to determine what you have.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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#10 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
I'm at work right now but I had it written down. I couldn't find anything about these numbers but I think it says K02040B. I didn't take the alternator off to see for sure. Any help would be great, thanks!
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#11 |
Registered User
Join Date: Jul 2012
Location: Ft Wayne Indiana
Posts: 1,204
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Re: Which choke thermostat?
Can't see it the greatest, but we made a bracket that goes under one of the manifold bolts for mine:
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71 K20 64 GMC mud truck |
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#12 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
I may try that with a thermostat that I have. I was concerned that it would not heat up fast enough. I guess having the choke come off too slow is only going to use a bit more fuel. Thanks for the photo!!
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#13 |
Registered User
Join Date: Jul 2012
Location: Ft Wayne Indiana
Posts: 1,204
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Re: Which choke thermostat?
No problems warming mine up in the morning, works like a charm
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71 K20 64 GMC mud truck |
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#14 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
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#15 |
Proprietor of Dale's Corner
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Location: Vacaville , CA
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Re: Which choke thermostat?
My memory is starting to warm up and that pic of the aluminum manifold just kick started it. I believe edlbrock makes a block that bolts over that spot becauase new manifolds are made to accept the newer style heat tubes and they make an adaptor to go to old style
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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#16 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
I'll see what I can find about that.
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#17 |
Proprietor of Dale's Corner
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Re: Which choke thermostat?
Summit might be able to help you out
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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#18 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
I'll check on their website. Thanks!
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#19 |
Florida Edition
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Location: Fruitland Park, FL
Posts: 4,025
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Re: Which choke thermostat?
If you post up the manifold casting number we can tell you what it is, also the block casting number is on the top driver's side where the tranny bolts to the block and the build date is on the pass. side. Best way to see it is to hold your camera back at the firewall pointed down and snap some pics.
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70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394 |
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#20 | |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
Quote:
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#21 |
Florida Edition
![]() ![]() Join Date: Oct 2010
Location: Fruitland Park, FL
Posts: 4,025
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Re: Which choke thermostat?
Also you could pull a valve cover and get the head casting number, a lot of things get swapped around in 40 years.
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70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394 |
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#22 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
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#23 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Which choke thermostat?
Interchangeable yes, but there's differences in them like intake/exhaust size and how they were designed for better fuel flow and compression.
__________________
68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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#24 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
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#25 |
Registered User
Join Date: Dec 2012
Location: Olathe, KS
Posts: 23
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Re: Which choke thermostat?
Well the head casting numbers are 3927185.
What I can find says those heads are for a '69 327 and '67-'73 307 & 350. The PO told me that his PO told him they put a 327 from a Monte Carlo in this truck. I think Monte Carlos came out in '70 and never came with a 327 so all this would lead me to believe this engine is a 307 or 350 in the range '70-'73. Can't see the block casting numbers as the engine is too close to the firewall. Anyway I rigged up a choke thermostat from a early '70's 350 similar to what 71K20CHEVY showed in his photo and it seems to be working pretty well. Thanks to everybody for their photos and suggestions! |
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