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Old December 9th, 2025, 05:47 AM
LordNatedawg LordNatedawg is offline
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Join Date: Sep 2019
Location: Sparks, Nevada
Truck: 1966 GMC 1500 Custom
Age: 26
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Default Re: "Papa Smurf" - 1966 GMC 1500 Custom

Pretty quick and easy weekend. I swapped out my rear shock absorbers for some Monroe shocks to match the front set. I also readjusted my drums once more. I failed to tighten up the left shoes sufficiently after I resurfaced the drums. That is now fixed.



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After the basic maintenance was done I took my truck on a 85 mile trip to go pick up a thermostatic air cleaner that I bought on Facebook. I hit the freeway and cruised at 65mph and 2700 rpm for about an hour. No issues occurred during the trip besides getting less than stellar fuel mileage. 11 mpg isn't great. It's only 1 mpg better than what I get on my daily commute to work. A SBC 350 should be able to squeeze out 14 mpg on the freeway. I'll have to figure out where those extra 3 mpg have run off to.



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Unfortunately this air cleaner won't work on my truck like I was hoping. I have too many things in the way of the snorkel and tubing on the passenger side. My rams horn manifolds also won't work with the heat stove. And the stove pipe would be rubbing against my heater hoses.



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I bought another air cleaner online. This time with a snorkel that points to the driver side. I'm hoping that will work better, although I will likely need to swap my valve covers from left to right to make the air cleaner work with my PCV system. The air cleaner hasn't shipped yet. So no test fit has been performed.

My goal with the air cleaner is to make sure my engine is getting air at a regulated temperature. Currently it runs "good" when it's frosty out, then great once under hood temperatures start to rise, then back to "good" once it gets really hot under the hood. Very subtle changes that could also account for some lost fuel mileage. We'll have to wait and see.

Last edited by LordNatedawg; December 9th, 2025 at 08:16 AM.
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