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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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| | | | Joined: Oct 2013 Posts: 331 Shop Shark | | Shop Shark Joined: Oct 2013 Posts: 331 | This would be pretty easy to do using 3 port egr vacuum solenoid off of a late model engine (pick your brand). Switch 12v to the solenoid then plumb manifold vacuum to the common port on the solenoid, plumb the other two ports accordingly to your vacuum servo.
1950 4100 - unrestored and driven weekly for almost no reason at all.
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