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 05-03-2019, 06:30 PM   #1
thirstybob
Registered User
 
Join Date: Mar 2019
Location: Denver, CO
Posts: 42
74 C20 Lowering

I need some advise. I installed Western Chasis 3" front springs and it didn't come close to lowering the front to where I wanted it. I guess my original springs had settled quite a bit. I'm wanting to install DJM 3" lower control arms. Will I have any alignment issues?
thirstybob is offline   Reply With Quote
Old 05-03-2019, 07:52 PM   #2
Ziegelsteinfaust
Registered User
 
Join Date: Dec 2012
Location: Temple City
Posts: 3,629
Re: 74 C20 Lowering

Don't use control arms. Use C30 drop spindles, and C30 calipers.

If your good with a welder pancaking the cross member is a good idea too.
Ziegelsteinfaust is offline   Reply With Quote
Old 05-03-2019, 08:07 PM   #3
thirstybob
Registered User
 
Join Date: Mar 2019
Location: Denver, CO
Posts: 42
Re: 74 C20 Lowering

what do you mean by pancaking the cross member?
thirstybob is offline   Reply With Quote
Old 05-03-2019, 09:45 PM   #4
Ziegelsteinfaust
Registered User
 
Join Date: Dec 2012
Location: Temple City
Posts: 3,629
Re: 74 C20 Lowering

If you look at the cross member it is something like 4" thick.

You can take 1.5" out of it, and bolt it back up to your frame. Then you have to flip your tie rods. Viola. A 1.5" drop with no loss of suspension travel.

When I first pancaked a cross member. I did a double pancake if you will. I lowered the frame mounting 1.5", and then thinned out the rest of the cross member. So I could Z the frame with out having to cut into the trans tunnel. In the end I had something like 4 inches of drop for about $50, and 16 hours of work.
Ziegelsteinfaust is offline   Reply With Quote
Old 05-03-2019, 10:14 PM   #5
thirstybob
Registered User
 
Join Date: Mar 2019
Location: Denver, CO
Posts: 42
Re: 74 C20 Lowering

That's good information. Thanks for sharing.
thirstybob is offline   Reply With Quote
Old 05-03-2019, 10:30 PM   #6
thirstybob
Registered User
 
Join Date: Mar 2019
Location: Denver, CO
Posts: 42
Re: 74 C20 Lowering

Quote:
Originally Posted by Ziegelsteinfaust View Post
Don't use control arms. Use C30 drop spindles, and C30 calipers.

If your good with a welder pancaking the cross member is a good idea too.
Why not go with lowering control arms?
thirstybob is offline   Reply With Quote
Old 05-03-2019, 11:37 PM   #7
Ziegelsteinfaust
Registered User
 
Join Date: Dec 2012
Location: Temple City
Posts: 3,629
Re: 74 C20 Lowering

Quote:
Originally Posted by thirstybob View Post
Why not go with lowering control arms?
They put the cross member below the scrub height. So if you loose a tire you very well can stick you A-arms or frame into the ground.

It is said that when you do a 4/6, but really a 5/7 drop the a arms get beat to death since they can come in contact with speed bumps. So you have to go straight over them.

If you have the time, and skill a pancaked cross member. With a small Z solves the frame scrub line issues, and smacking a arms in to speed bumps. All while giving you the stance you want. It cost less, but takes a bit of time.

People do it DJM arms, but you should be aware of the issues they may cause you.
Ziegelsteinfaust is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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 11:44 PM.


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