The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 06-22-2014, 05:00 PM   #1
Theoriginalsilverado
Registered User
 
Join Date: Nov 2013
Location: Norris Arm NL
Posts: 126
Question Dropping a C20

Hey guys,

I'm wondering if any of you would know how similar the front suspension set up is in a C20 compared to a C10. Specifically, how similar is the spring set up. I would like to lower the front of my C20 but the springs from LMC does not specify that they will fit a C20. Would this set up work on my C20? Also I was wondering if the rear drop shackles specified for the C10 will fit the rear suspension on my C20?

Thanks for the input
__________________
If It runs like a Chevy, it probably is!
Theoriginalsilverado is offline   Reply With Quote
Old 06-22-2014, 06:10 PM   #2
Ziegelsteinfaust
Registered User
 
Join Date: Dec 2012
Location: Temple City
Posts: 3,628
Re: Dropping a C20

The springs interchange, and may drop more due to the C20's gvwr.

You can use C30 drop spindles if you use the C30 caliper too.

I do not know about the shackles as I would of modified mine to trim my drop if I went down that road on my C20. I chose to make it a K20, and never got there.

C20 stock springs are very similar to C10 drop springs. I had Camper Special springs on my C20 when it was a C20. They were stiff. Compound this with the 8 leaf pack I had, and over loads. I needed to use 2500 pounds to soften the ride nicely.
Ziegelsteinfaust is offline   Reply With Quote
Old 06-23-2014, 06:52 AM   #3
Theoriginalsilverado
Registered User
 
Join Date: Nov 2013
Location: Norris Arm NL
Posts: 126
Re: Dropping a C20

My truck is actually a Camper special, 1975. So I would be able to purchase the drop springs from LMC to install on my truck? I'm thinking about putting 20" wheels on her so how much of a drop should I go for?
__________________
If It runs like a Chevy, it probably is!
Theoriginalsilverado is offline   Reply With Quote
Old 06-23-2014, 07:26 AM   #4
lolife99
67-72 parts collector,…
 
lolife99's Avatar
 
Join Date: Nov 2002
Location: Mid-MO
Posts: 22,700
Re: Dropping a C20

Screw LMC.
There are many better places to order suspension parts.
Look at www.earlyclassic.com
Give them a call.

Or use our board vendors.
Travis at ProPerformance should be able to fix you up.
http://www.azproperformance.com/home.php

www.performanceonline.com sells C20 drop spindles.
__________________
Keith

Convert to disc brakes.
http://67-72chevytrucks.com/vboard/s...d.php?t=444823

Last edited by lolife99; 06-23-2014 at 07:35 AM.
lolife99 is offline   Reply With Quote
Old 06-23-2014, 09:02 AM   #5
Ziegelsteinfaust
Registered User
 
Join Date: Dec 2012
Location: Temple City
Posts: 3,628
Re: Dropping a C20

When you drop your truck it is all about where you want it to sit afterwards.

If 20s are you target wheel size. Find which tire you want to run, take it outside diameter, compare it to your current set-up, and figure out how low you wanna go.

If I dropped my C20 as was one of my plans I would of ran 17's with 255/50/17 / 275/50/17, and gone down about 8/10 combined tire/lowering kit. Which is like a 5/7 on a C10 due to mine being higher already. Also I would of bought the tires/wheels last so I can make last minute changes to my goals
Ziegelsteinfaust is offline   Reply With Quote
Old 06-23-2014, 01:25 PM   #6
SCOTI
Registered User
 
SCOTI's Avatar
 
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,064
Re: Dropping a C20

How much drop do you want? If only mild drop is desired (~2"), just have 1 coil trimmed off the current springs.
__________________
67SWB-B.B.RetroRod
64SWB-Recycle
89CCDually-Driver/Tow Truck
99CCSWB Driver
All Fleetsides
@rattlecankustoms in IG

Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
SCOTI is offline   Reply With Quote
Old 06-23-2014, 03:02 PM   #7
tinydb84
Registered User
 
tinydb84's Avatar
 
Join Date: Jul 2009
Location: San Jose Ca
Posts: 2,871
Re: Dropping a C20

I have the same truck. Ended up bagging it though. I'd trim the spring if all you want is 2''. POL makes drop spindles for C20's.

I got a used set of shackes and hangers from someone off the board for too cheap to pass up (even though they are air baggit) and they are different from C10's from my research. I pulled 3 leafs when I did the shackes and hangers. It dropped 6 inches. Here is a pic with the rear lowered.

__________________
David
Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991
My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985
Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557
Instagram: myfabguy
tinydb84 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:38 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com