New memeber old mechanic 73 chevy 350

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new73chevyjob

Junior Member
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Apr 13, 2025
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Location
Arizona
First Name
Cami
Truck Year
1973
Truck Model
Cheyenne 20
Engine Size
350
Hello all,
I got myself a 1973 chevy cheyenne with 350. Been wrenching since I was 8 (not telling my age now but I am OLD) so I know some stuff but this rebuild is going to have alot of question. Someone else's problem has become mine. I was told the engine runs but the truck won't brake. So here we go trying to get started.
Thank you all in advance.
 
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legopnuematic

Licensed Junk Dealer
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Location
MO
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Spencer
Truck Year
1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
Truck Model
Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
Engine Size
225/6, 350 c.i., 350 c.i., 5.9l Cummins
Welcome from Missouri.
 

animal

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Location
Georgia
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Lee
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1986
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c10 silverado
Engine Size
350ish
:welcome:
 

ali_c20

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Location
Austria
First Name
Alexander
Truck Year
1974, 1979
Truck Model
C20, K5
Engine Size
350, 350
Welcome from Austria. We want truck pics.
 

75gmck25

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Location
Northern Virginia
First Name
Bruce
Truck Year
1975
Truck Model
K25 Camper Special TH350 NP203
Engine Size
5.7
Welcome!

Check the rear end to see if it’s a 14 bolt FF, which are used on the high GVW C20’s.

Brake work on a FF is harder because you have to pull the axles to get the drums off or replace a wheel cylinder, so it gets ignored for many years. You might just have a really bad wheel cylinder leak. The rest of the braking system is pretty standard.

Another common issue with no brakes is a blown seal in the master cylinder, so you get no pressure. It’s relatively easy to fix, and the master cylinder is not expensive. Also check the flexible lines to each wheel, for cracks or leaks.
 

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