GM Square Body swb 4x4 Build & Upgrades

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High Roller Ron

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Brandenburg Ky.
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Ron
Truck Year
1977 Chevy 4x4 swb
Truck Model
Chevy 4x4
Engine Size
350
Thanks ed
Im thinkin this thread needs to be moved or i need to start over some were else
Can a moderator help move this thread ?
 

High Roller Ron

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Posts
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Location
Brandenburg Ky.
First Name
Ron
Truck Year
1977 Chevy 4x4 swb
Truck Model
Chevy 4x4
Engine Size
350
Im also thinkin there really isnt alot a traffic here to keep a discussion going ?
I actually expected alot more people to post
 

High Roller Ron

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Posts
53
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Location
Brandenburg Ky.
First Name
Ron
Truck Year
1977 Chevy 4x4 swb
Truck Model
Chevy 4x4
Engine Size
350
The truck has sat awhile....i wish i had more time to work on it....
I have new brake lines to install.... but I was hoping to have already had some replies back on the master cylinder swop....
 

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High Roller Ron

Full Access Member
Joined
Sep 14, 2021
Posts
53
Reaction score
9
Location
Brandenburg Ky.
First Name
Ron
Truck Year
1977 Chevy 4x4 swb
Truck Model
Chevy 4x4
Engine Size
350
Im askin if some one can help Im needing the wiring diagram for the cab....firewall....to engine bay...example
 

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Bextreme04

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Location
Oregon
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Eric
Truck Year
1980
Truck Model
K25
Engine Size
350-4bbl
Im also thinkin there really isnt alot a traffic here to keep a discussion going ?
I actually expected alot more people to post
The forum gets a little weird with the build threads and they dont show up in the normal "recent activity" section on the right side. If you have a specific question it is often better to ask it in the specific forum section in it's own thread and then post the overall changes to the truck here in the build thread.

I'll try and answer some of the things I've seen in here so far though. You can tell year and basic options of the vehicle from the VIN. That includes the original and the cab VIN.

The ride will be noticeably softer with a 56" spring over a 52".

There is in-fact a company that makes a disk brake conversion for a 12 bolt truck rear end and you can tell original gearing for your rear axle using the first three letters stamped on the top of the passenger side axle tube of the rear end.

There is no benefit to changing style of vacuum booster and master cylinder. In fact, the heavier duty JB7 brakes used the metal master cylinder reservoir all the way into the late 80's I believe. The different master cylinders will need to match your specific brake equipment.

You can find all service manuals and wiring diagrams in the "resource library" section under the service manuals sticky. They are downloadable PDF's.

Quoting someone's post or putting an @ symbol before typing their name will tag and alert people to a response, or if you have a specific question for them to make sure they see it the next time they log on. Otherwise responses and answers can get lost in the system without people knowing you want to talk to them or are responding to their posts.
 

Bextreme04

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1980
Truck Model
K25
Engine Size
350-4bbl
You also might want to ask an admin like @HotRodPC to move this to a build thread?
 

1973c10

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Don
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1973
Truck Model
C10
Engine Size
454
Welcome
 

High Roller Ron

Full Access Member
Joined
Sep 14, 2021
Posts
53
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9
Location
Brandenburg Ky.
First Name
Ron
Truck Year
1977 Chevy 4x4 swb
Truck Model
Chevy 4x4
Engine Size
350
Its been awhile....we since moved and Im without a shop so my work is going to be limited even more.
Hope to get back working on the truck soon
I am wanting to put a manual tranny in and thinkin a NV3500 or NV4500...... whats the major differences between the 2 tranny's ?
 

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