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 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 01-17-2010, 09:29 PM   #1
jdcole
Registered User
 
jdcole's Avatar
 
Join Date: Feb 2009
Location: Canyon TX
Posts: 63
Trailing arm install

Why is my donor frame crossmember different from my leafspring frame setup? Do i need to change this crossmember over to install the upper spring mounts? I need to get rid of the leafspring mounts. Can i use the old shock mounts or can i use the ones on the original leafspring setup? I am thinking about a 5" drop in the rear.
Attached Images
     
__________________
1969 Chevy LWB 350 converting to short stepper
My build thread

Last edited by jdcole; 01-17-2010 at 09:35 PM.
jdcole is offline   Reply With Quote
Old 01-17-2010, 09:31 PM   #2
energiesource
Registered User
 
Join Date: Apr 2007
Location: Edmonton, AB, CAN
Posts: 346
Re: Trailing arm install

im pretty sure you need to switch out the cross member. you might be able to weld the trailing arm brackets onto your current one, but i think it'd be easier to swap it out. i have leaf springs in mine, im pretty sure you can use the same stock mounts though, sorry im not much help
energiesource is offline   Reply With Quote
Old 01-17-2010, 09:50 PM   #3
jdcole
Registered User
 
jdcole's Avatar
 
Join Date: Feb 2009
Location: Canyon TX
Posts: 63
Re: Trailing arm install

I just reread this and it doesnt even make sense to me. If you look at the 3rd pic and 4th pic the crossmembers locations are different. My question is do i need to change this over. The original leafspring shock mounts will then be in the way and have to be moved. When i test fitted the lower shock mounts they will be pretty close to the same area as what they were in the donor frome only more outboard. Is this making any sense to anyone what i am trying to accomplish? I have a headache
__________________
1969 Chevy LWB 350 converting to short stepper
My build thread
jdcole is offline   Reply With Quote
Old 01-19-2010, 10:27 PM   #4
jdcole
Registered User
 
jdcole's Avatar
 
Join Date: Feb 2009
Location: Canyon TX
Posts: 63
Re: Trailing arm install

Does anyone have an answer for me?
__________________
1969 Chevy LWB 350 converting to short stepper
My build thread
jdcole is offline   Reply With Quote
Old 01-19-2010, 10:40 PM   #5
redbaron69
Registered User
 
redbaron69's Avatar
 
Join Date: Jan 2009
Location: marion nc
Posts: 588
Re: Trailing arm install

im pretty sure the the frame rails are different when it comes to leaf vs. coils. the crossmember you need for the coils is not a direct bolt in, being it a leaf frame originaly it dosent have the holes there to put it. you may have to do some measuring and drilling to get it right. but like i said im not 100% sure on this.
__________________
69 short fleet 350/350 "under construction"
70 short step 307/3 speed
redbaron69 is offline   Reply With Quote
Old 01-20-2010, 01:20 AM   #6
powerbench
Registered User
 
powerbench's Avatar
 
Join Date: Oct 2006
Location: Surrey B.C
Posts: 432
Re: Trailing arm install

the frames are the same , i just did this swap. You need to have all the brackets and crossmembers from the coil truck ....i'll see if i can find my pics for ya
powerbench is offline   Reply With Quote
Old 01-20-2010, 01:42 AM   #7
powerbench
Registered User
 
powerbench's Avatar
 
Join Date: Oct 2006
Location: Surrey B.C
Posts: 432
Re: Trailing arm install

The shocks mount to the crossmember on a coil truck, not sure if you can reuse the leaf one, you'll have to double check( i had the one from my old coil spring already sandblasted so i didn't pay much attention) ...your gonna need the frame stiffeners that are on the inside of the frame and the pads for the coils to rest on...And the the bracket for the track bar that is just behind the crossmember.....don't forget to buy a shock relocator kit( you need to reposition the shocks) and a adjustable track barName:  frame  small 1.jpg
Views: 254
Size:  69.6 KB

Name:  frame small 2.jpg
Views: 268
Size:  60.9 KB

Name:  the frame small.jpg
Views: 273
Size:  56.5 KB

Name:  frame small 6.jpg
Views: 268
Size:  52.0 KB

Name:  frame small 7.jpg
Views: 273
Size:  60.0 KB

Last edited by powerbench; 01-20-2010 at 01:50 AM.
powerbench is offline   Reply With Quote
Old 01-20-2010, 01:49 AM   #8
powerbench
Registered User
 
powerbench's Avatar
 
Join Date: Oct 2006
Location: Surrey B.C
Posts: 432
Re: Trailing arm install

hope this is ok posting all these for himName:  frame small 3.jpg
Views: 272
Size:  64.7 KB

Name:  frame small 8.jpg
Views: 263
Size:  61.0 KB
powerbench is offline   Reply With Quote
Old 01-20-2010, 12:55 PM   #9
jdcole
Registered User
 
jdcole's Avatar
 
Join Date: Feb 2009
Location: Canyon TX
Posts: 63
Re: Trailing arm install

Thanks for the info. That is what i needed to know. It was the frame stiffeners i was worried about. Thanks for the info Powerbench.
__________________
1969 Chevy LWB 350 converting to short stepper
My build thread
jdcole 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 06:37 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com