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75gmck25's latest activity
75gmck25
replied to the thread
Help cant get heater box out
.
It’s been a long time since I replaced mine, but I don’t think the AC box had to come out. However there is one stud hidden by the...
Sep 30, 2024
75gmck25
replied to the thread
Where does this go???
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Cigarette lighter wiring should be orange, since it provides constant power to the plug.
Sep 27, 2024
75gmck25
replied to the thread
T-Fitting for Oil Pressure Gauge and Switch
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They used to sell them at the auto parts store in the same place they had gauges, but it's been a long time since I've seen that...
Sep 26, 2024
75gmck25
replied to the thread
Help locating shift indicator part
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I replaced the string on mine with nylon fishing line that is tied to the metal retainer. It’s worked fine for years.
Sep 24, 2024
75gmck25
replied to the thread
Engine Paint Color Question
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My original ‘75 engine was probably orange, but I’ve never really liked that color. However, sometimes its because I see a picture...
Sep 24, 2024
75gmck25
replied to the thread
Building a new motor for my 79 C10 - would love some advice!
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Some general guidance- start out with better heads and higher compression. - Original smog heads are very poor flow. Better flowing...
Sep 23, 2024
75gmck25
replied to the thread
HVAC Vacuum setup
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The small diameter vacuum line is sold in two sizes, and it’s often referred to as GM hard vacuum line. Parts stores used to stock it...
Sep 23, 2024
75gmck25
replied to the thread
HVAC Vacuum Controls
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Sounds like they integrated the functions of the vacuum reservoir more in the later years. For my ‘75, I think that was the first year...
Sep 22, 2024
75gmck25
replied to the thread
Carb Swap?
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The Edelbrock AVS2 is an improved design over the old 1406, and it is supposed to have better performance parameters. Annular boosters...
Sep 22, 2024
75gmck25
replied to the thread
HVAC Vacuum Controls
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The reservoir on the drivers side is usually for the cruise control. The HVAC reservoir is on the passenger side, very close to the...
Sep 22, 2024
75gmck25
replied to the thread
Wire terminal ID
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See if you can match it to one that these guys sell...
Sep 21, 2024
75gmck25
replied to the thread
Nasty gas tank
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On Roadkill TV show they always put at least two of the large diameter metal-body fuel filters inline before the fuel pump when they...
Sep 20, 2024
75gmck25
replied to the thread
1981 C30 cluster issue
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Did you make sure you connected the cluster ground? It’s usually a black wire connected to a post on the emergency brake mechanism, or...
Sep 20, 2024
75gmck25
replied to the thread
74 C20 Ammeter
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The stock ammeter uses the resistance of the wiring harness as a shunt. There are two fuses under the hood where it connects to the...
Sep 20, 2024
75gmck25
replied to the thread
Rear end
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It is possible that your truck has 4.56 gears, since it’s a one ton. Changing from 16” to 17” rims is not the key measurement. You...
Sep 17, 2024
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