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01-27-2023, 01:39 PM
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#1 |
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Registered User
 Join Date: Mar 2021
Location: Denton, TX
Posts: 1
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Heat Riser Valve
I'm returning a 1972 C20 truck with its original 350 back to stock using the original cast iron intake and quadrajet carb. I will leave the crossover passages in the intake open as they were were originally. From the factory when new did the passenger side exhaust use a heat riser valve between the exhaust manifold and exhaust pipe?
TIA Last edited by LockDoc; 01-28-2023 at 11:35 PM. |
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01-27-2023, 03:17 PM
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#2 | |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,694
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Re: Hear Riser Valve
Quote:
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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01-27-2023, 05:40 PM
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#3 |
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Registered User
Join Date: Jul 2008
Location: Eastern Oregon
Posts: 2,385
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Re: Hear Riser Valve
My 71 C/20 has no valve ?
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71 C-20 07 Magnum RT AWD |
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01-27-2023, 07:10 PM
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#4 |
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Senior Member
Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,847
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Re: Hear Riser Valve
My'69 C/20 with a 350 came from the factory with the heat riser on the driver's side.
Best pic I can find.
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Jim |
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01-27-2023, 08:22 PM
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#5 |
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Registered User
Join Date: Nov 2022
Location: Seattle, WA
Posts: 323
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Re: Hear Riser Valve
my 350 engine had been removed, as a lot in the Pacific Northwest trucks had, but all the historical or current pics I have seen show it on the driver's side. memory serves me that the big block had it on the passenger side, and not sure about other engines. I "believe" all 350's had it on the driver side. Any easy tell-tale was how the stock aircleaner was installed. if the intake neck was on the driver side then the heat riser and stove pipe would follow suit. Perhaps do you still have the factory label on the aircleaner? that might help tell you how yours was.
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'72 C10 Cheyenne SWB North Carolina truck for 50 years, 72k original miles, Medium/Hawaiian Blue, 3 owners - one for 40 years, garaged kept, original: sheetmetal, undercarriage, moldings, glass * * * New - engine rebuild at 65k in 2015, one repaint in 2010, new front bumper, houndstooth seat, carpet, 8 inch rally wheels on 275-60R-15, LED lighting. - Semper Paratus! |
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01-27-2023, 08:59 PM
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#6 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,694
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Re: Hear Riser Valve
Could be possible that 2WD trucks had it on the drivers side, and 4WD was on the passenger side?
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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01-27-2023, 10:02 PM
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#7 |
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Senior Member
Join Date: Jun 2021
Location: West milford nj
Posts: 328
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Re: Hear Riser Valve
My 70 350 4x4 had it on the passenger side. Took it off when I put the fuel injection on
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