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04-25-2024, 05:15 PM
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#1 |
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All stock and staying that way
 
Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,302
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Not all air cleaner tubes are created equal
Here is a comparison of two presumably small block heated air cleaner tubes. The white longer unit is correct for 4wd 1970-72 350 engines. I'm unsure what the other tube, which is black and shorter is correct for. The shorter black tube bolts on and fits the air cleaner, but it will clock the air cleaner snorkel closer to the brake master cylinder.
The original tube on my 1970 Blazer 350 was rough, so it was discarded. Fortunately, I had 2 spare correct long tubes, and 2 shorter tubes.
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress...  1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor...  2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels |
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04-25-2024, 10:11 PM
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#2 |
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Senior Member
Join Date: Apr 2016
Location: Fairbanks, AK
Posts: 329
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Re: Not all air cleaner tubes are created equal
Good information. Thanks
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1972 GMC K2500 Super Custom Matt |
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04-26-2024, 07:19 AM
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#3 |
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All stock and staying that way
Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,302
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Re: Not all air cleaner tubes are created equal
The shorter tubes were pulled from a '70-'72 truck sometime in the '90's. Just not sure if 307, or 2WD...
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels |
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04-26-2024, 11:06 AM
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#4 |
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Registered User
Join Date: Jul 2008
Location: Eastern Oregon
Posts: 2,262
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Re: Not all air cleaner tubes are created equal
Can you tell me where up obtain the sticker on side of air cleaner ? Thanks
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71 C-20 07 Magnum RT AWD |
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04-26-2024, 01:40 PM
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#5 |
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All stock and staying that way
Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,302
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Re: Not all air cleaner tubes are created equal
I purchased mine from LMC. At my house in 48hrs. Part number 38-0160 Decal-Air Cleaner. $8.95 plus $5 to ship in padded mailer.
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels |
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04-26-2024, 01:56 PM
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#6 |
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Registered User
Join Date: Jul 2008
Location: Eastern Oregon
Posts: 2,262
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Re: Not all air cleaner tubes are created equal
Thanks man I appreciate it..Jack
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71 C-20 07 Magnum RT AWD |
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04-29-2024, 10:54 AM
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#7 |
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All stock and staying that way
Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,302
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Re: Not all air cleaner tubes are created equal
This 1970 307 C10 appears to have the short tube.
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels |
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04-29-2024, 11:01 PM
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#8 | |
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Senior Member
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,129
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Re: Not all air cleaner tubes are created equal
Quote:
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s details such as OEM identifications& part numbers, written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 04-29-2024 at 11:18 PM. |
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05-02-2024, 07:21 AM
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#9 |
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All stock and staying that way
Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,302
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Re: Not all air cleaner tubes are created equal
The 6485382 part number corresponds to the air cleaner assembly as per the GM parts books:
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels |
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Today, 08:40 AM
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#10 |
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All stock and staying that way
Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,302
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Re: Not all air cleaner tubes are created equal
The small block carb air heater tube part numbers are as follows:
1969-72 307 Exc. oil bath or 4WD 3951374 1969-72 ALL 350 Exc. oil bath 1971 307 series 20-30 1972 307 4WD 3951484
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels |
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