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 04-20-2010, 07:12 PM   #1
waltharper
Registered User
 
waltharper's Avatar
 
Join Date: Dec 2009
Location: Eagle Point, or
Posts: 6
need to lower 3 inches a 79 1/2ton

I got a nice little short/wide 1/2 ton. She has a very good 250 in-line with a 4 speed granny low, but no PS.

A few things need to be done to her to make a smooth riding truck. She will run down the road at 75 with no problem and haul 2 yards of dirt with no problem but she needs to go down about 3 inches I think.

What is a good easy "CHEAP" way to do this?

Also where can I find a "CHEAP" front sway bar for this girl?

Any help would be appricated.........
waltharper is offline   Reply With Quote
Old 04-20-2010, 08:01 PM   #2
big10ratrod77
Registered User
 
big10ratrod77's Avatar
 
Join Date: Aug 2009
Location: hillborough nc
Posts: 410
Re: need to lower 3 inches a 79 1/2ton

sway bar ya can get one off a 3/4 ton truck from a junk yard for like 20 or so bucks and when ya lower it you shouldnt need some of the brackets that are needed on a stock truck. ide say go 2.5 in the front and 4 in the back it wouldnt slam it but it would look good ive been lookin at a lowerng kit like that for my 77 even tho dad wont let me do it. the kit is five hundred and it comes with the spindles and the hangers and shackles.
__________________
77 chevy BIG 10 350/sm465/12bolt w 3.73 bout 240 horse power NO power steerin
79 chevy 1/2 ton 250/three on the tree/3.08s soon to get built 250/floor shift conversion/3.08s
81 mercedes 300d 25 MPG
77 chevy BIG DOOLEY 454/sm-465/14 bolt 4.10s "fully loaded"
73 plymouth duster 225 slant six/230 3 speed/8 1/4 trying to acheve 300 horse six http://www.cardomain.com/ride/3135091
'77 chevy trucks. built to stay tough.
life is short build a hot rod
big10ratrod77 is offline   Reply With Quote
Old 04-20-2010, 08:07 PM   #3
85gmcguy
Plays with trucks
 
85gmcguy's Avatar
 
Join Date: Sep 2003
Location: Asheville, NC
Posts: 433
Smile Re: need to lower 3 inches a 79 1/2ton

If you search "lowering C-10" you could probably read for hours. It's been kicked around on here for a loooong time. Cheapest sway bar source is the wrecking yard. Make sure you get the mounting brackets, too, aftermarket brackets ain't cheap... And Welcome!
__________________
Gary

My Dad's Old Truck
1985
85gmcguy is offline   Reply With Quote
Old 04-20-2010, 09:36 PM   #4
N2TRUX
Happy to be here
 
N2TRUX's Avatar
 
Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
Re: need to lower 3 inches a 79 1/2ton

If it were me, I would go with a set of 2.5 or 3" spindles for the front. For the rear, you can go with a 2" shackle, and raise your front spring hanger an inch. The only way to get it much cheaper is cutting your stock springs up front.

I have no objections to cutting springs if done properly, but trying to get 3" from them will result in a harsh ride. Drop spindles won't change your ride at all.
__________________
Follow me on Facebook and Instagram @N2trux.com

Articles-

"Jake" the 84 to 74 crewcab

"Elwood" the77_Remix

85 GMC Sierra "Scarlett"

"Refining Sierra"
N2TRUX is offline   Reply With Quote
Old 04-20-2010, 10:04 PM   #5
SBTork
Garage wrench
 
SBTork's Avatar
 
Join Date: Feb 2008
Location: LaCrosse, WI
Posts: 1,855
Re: need to lower 3 inches a 79 1/2ton

Quote:
Originally Posted by N2TRUX View Post
If it were me, I would go with a set of 2.5 or 3" spindles for the front. For the rear, you can go with a 2" shackle, and raise your front spring hanger an inch. The only way to get it much cheaper is cutting your stock springs up front.

I have no objections to cutting springs if done properly, but trying to get 3" from them will result in a harsh ride. Drop spindles won't change your ride at all.
that's what I would do aswell. I have heard of guys with 3" drop springs hating the way they ride. Look into Classic Performance Parts, or site vender Jeff @ CPP, he can get you a really good deal on drop spindles.
__________________
-Adam


90 V1500 GMC Suburban 350/700R4/NP241.....
01 Saturn SL1 stock DD.....
SBTork is offline   Reply With Quote
Old 04-21-2010, 07:14 AM   #6
OARNGESI
Registered User
 
OARNGESI's Avatar
 
Join Date: Sep 2008
Location: CASA GRANDE AZ
Posts: 4,276
Re: need to lower 3 inches a 79 1/2ton

Quote:
Originally Posted by n2trux View Post

i have no objections to cutting springs if done properly, but trying to get 3" from them will result in a harsh ride. Drop spindles won't change your ride at all.
ive read on here from a few different members that if you want a 3in drop from springs stock cut springs ride better than 3in lowering springs
__________________
70 SWB STEPSIDE
70 BLAZER
09 challenger
OARNGESI is offline   Reply With Quote
Old 04-21-2010, 07:58 AM   #7
westofb
I really hate wet sanding!
 
westofb's Avatar
 
Join Date: Dec 2008
Location: Brookfield, MO
Posts: 601
Re: need to lower 3 inches a 79 1/2ton

get the junk yard sway bar 3/4 ton, they are much larger than 1/2 ton for 20 bucks like mentioned above. Cut one coil off the bottom of your front spring, that's free just a little labor, move your front rear spring hangar up 2" higher on the frame.... again free, just a slight pita cutting off the old rivets and drilling new holes, well I guess you will have to buy 8 grade eight bolts too reattach them to the frame so say that will cost you about $3.00. Then but a set of drop spring shackles for around 20 bucks. You are looking at less than $45 in parts and should give you a 2-3 inch front drop and 4" rear, with the money you saved doing it way, spend it on parts that need replacing you are bound to find (ball joints, tie rod ends, brake componets, etc) when you have it apart!
__________________
Jeff,

68 C-10
75 C-20, now a C-10!
10 F-150
westofb is offline   Reply With Quote
Old 04-21-2010, 12:23 PM   #8
MobSled
Registered User
 
MobSled's Avatar
 
Join Date: Oct 2009
Location: Downey, CA
Posts: 110
Re: need to lower 3 inches a 79 1/2ton

Cheap is never good for a truck if its meant to be as a daily driver. I do agree with the posts above. 3/4 ton swaybar from the junkyard, cut the 2 coils off the front springs, buy some lowering shackels and either remove some leafs or move the hangers up higher. Throughout my expiriences I found removing the leafs a lot easier then cutting the rivets and drilling holes through the frame to mount the hangers higher. Just my .02, good luck and good times!
MobSled is offline   Reply With Quote
Old 04-21-2010, 12:29 PM   #9
Keith Seymore
Registered User
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 9,176
Re: need to lower 3 inches a 79 1/2ton

I cut the springs in front, raised the hangers in the back.

Total cost was $1.38 for the grade eight bolts and $20 for an alignment (in 1987 dollars).

Been a daily driver for 24 years and 183,000 miles!

K


__________________
Chevrolet Flint Assembly
1979-1986
GM Full Size Truck Engineering
1986 - 2019
Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926
My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524
Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

Last edited by Keith Seymore; 04-21-2010 at 12:30 PM.
Keith Seymore is offline   Reply With Quote
Old 04-21-2010, 01:12 PM   #10
westofb
I really hate wet sanding!
 
westofb's Avatar
 
Join Date: Dec 2008
Location: Brookfield, MO
Posts: 601
Re: need to lower 3 inches a 79 1/2ton

Quote:
Originally Posted by Keith Seymore View Post
I cut the springs in front, raised the hangers in the back.

Total cost was $1.38 for the grade eight bolts and $20 for an alignment (in 1987 dollars).

Been a daily driver for 24 years and 183,000 miles!

K



There you go! I guess I should have figured in the cost of an alignment as well, another $50-100 depending on the local rate.

Someone else commented on my origial post about not moving the hangers and to do the rear by removing leafs, yes that will lower the truck. However if you want to still use is as a truck, you would be drastically reducing your ability to haul and tow stuff!
__________________
Jeff,

68 C-10
75 C-20, now a C-10!
10 F-150
westofb is offline   Reply With Quote
Old 04-21-2010, 03:04 PM   #11
waltharper
Registered User
 
waltharper's Avatar
 
Join Date: Dec 2009
Location: Eagle Point, or
Posts: 6
Re: need to lower 3 inches a 79 1/2ton

So this what my rig should look like when I am done. maybe not quite as shinny and with round head lights.......thanks for the advice.

How hard is it to redrill the frame?
waltharper is offline   Reply With Quote
Old 04-21-2010, 03:30 PM   #12
Keith Seymore
Registered User
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 9,176
Re: need to lower 3 inches a 79 1/2ton

Cutting the rivets is alot worse than redrilling the frame.

You can wack them with a hammer and chisel, or take a die grinder and grind the heads off. In either case, once you've done that you tap them and they come right out.

A couple other considerations:

a) It's critical that the front hangers get moved straight up; any mismatch side to side hear will result in dog tracking, because that's what locates the rear axle.

b) Depending on how high you move the brackets up you will run out of real estate to attach the rear spring hanger. I typically use two bolts and then run the spring eye bolt through the frame as well (using a spacer) to triangulate the attachment.

K



__________________
Chevrolet Flint Assembly
1979-1986
GM Full Size Truck Engineering
1986 - 2019
Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926
My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524
Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

Last edited by Keith Seymore; 04-21-2010 at 03:31 PM.
Keith Seymore is offline   Reply With Quote
Old 04-21-2010, 06:02 PM   #13
waltharper
Registered User
 
waltharper's Avatar
 
Join Date: Dec 2009
Location: Eagle Point, or
Posts: 6
Re: need to lower 3 inches a 79 1/2ton

Quote:
Originally Posted by Keith Seymore View Post
Cutting the rivets is alot worse than redrilling the frame.

You can wack them with a hammer and chisel, or take a die grinder and grind the heads off. In either case, once you've done that you tap them and they come right out.

A couple other considerations:

a) It's critical that the front hangers get moved straight up; any mismatch side to side hear will result in dog tracking, because that's what locates the rear axle.

b) Depending on how high you move the brackets up you will run out of real estate to attach the rear spring hanger. I typically use two bolts and then run the spring eye bolt through the frame as well (using a spacer) to triangulate the attachment.

K




Keith, your truck looks really good.

I am hoping my will look that good again.

might hit you up for some suggestions as time goes by. I don't have a lot of cash and hoping to most of this my self. I got a good level paved driveway and a few tools.
waltharper is offline   Reply With Quote
Old 04-21-2010, 08:57 PM   #14
westofb
I really hate wet sanding!
 
westofb's Avatar
 
Join Date: Dec 2008
Location: Brookfield, MO
Posts: 601
Re: need to lower 3 inches a 79 1/2ton

I would also suggest the when and if you decide to move the rear hangers skyward, get a couple stout saw horses and at least 3 friends and set the bed off on the saw horses. Seymore is correct, cutting off the old rivets is much tougher than drilling the new holes, an air chisle could become your new best friend when doing this job if you can get one to use. Hand chisles and punches will work too, and don't forget the big f***ing hammer...LOL. I also liked Seymores idea about the spacer and longer spring eye bolt through the frame.
__________________
Jeff,

68 C-10
75 C-20, now a C-10!
10 F-150
westofb 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 10:58 AM.


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