Best rear drop? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

resto_rookie · 11-08-2009, 01:40 AM

Working on my first '72 project and wanting to know which rear drop would be best for ride quality. 6" drop coils or 2" blocks and 4" coils?

powell72 · 11-08-2009, 02:12 AM

First off, welcome. I don't believe there is a difference in ride between the two, I've had a truck dropped 4'' in the rear and one dropped 6'' and didn't notice a difference. I'd go for the 6'' springs since the springs are the same price and then you don't need to spend money on the blocks.

resto_rookie · 11-08-2009, 02:23 AM

Thanks

big_al_71 · 11-08-2009, 08:20 AM

welcome and for sure go with 6 inch rear springs forget about the blocks....

Longhorn Man · 11-08-2009, 09:11 AM

you'll want to plan on a c notch in there too. the axle will probably slam into the frame a lot

cdowns · 11-08-2009, 10:52 AM

dont forget shock relocators and adjustable panhard//i like to use new trailing arm bushuings too

resto_rookie · 11-09-2009, 02:37 PM

I was wondering about the c notch and forgot to ask earlier. Is the adjustable panhard a must have? I've got it completely apart and was gonna do the bushings, just trying to get a complete list together so I know what to order.

**lks dcvn** · 11-09-2009, 02:41 PM

a 4" drop would be better with an adjustable panhard bar, drop shocks and shock relocators...

So a 6" drop would need these for sure...

Mike J · 11-09-2009, 03:07 PM

Im doing a 7" drop in the rear with 5" springs and 2" blocks. Adjustable panhard bar, drop shocks, shock relocater kit, c-notches, and drop center crossmember-- BUT I havent started on the rear yet- just got the front end together yesterday (5.5" drop) 3" springs and 2.5" drop spindles. I bought my truck somewhere around Hardinsburg btw lol Good to see another KY guy on here! Good luck man!

72BlckButy · 11-09-2009, 03:38 PM

As with many posted above... just run the 6" spring. It's what I installed on my '69 (w/o a notch) and I have yet to bottom out.

Tx Firefighter · 11-09-2009, 05:47 PM

I've run 6 inch springs on a good number of trucks with no c notch and never had a bottoming issue either.

big_al_71 · 11-09-2009, 06:17 PM

Quote:

Originally Posted by 72BlckButy

As with many posted above... just run the 6" spring. It's what I installed on my '69 (w/o a notch) and I have yet to bottom out.

Quote:

Originally Posted by Tx Firefighter

I've run 6 inch springs on a good number of trucks with no c notch and never had a bottoming issue either.

I agree 100% as I also have six inch springs and have never bottomed out...of course the streets aroubd here are relatively perfect....

resto_rookie · 11-09-2009, 07:28 PM

I appreciate all the info. Like I said first build so I'll probably have a million more questions. Soon as I figure out how I'll get a build thread started so you can see what I'm working with. Haven't figured out the pic upload yet

ChevLoRay · 11-09-2009, 09:41 PM

Quote:

Originally Posted by lks dcvn

a 4" drop would be better with an adjustable panhard bar, drop shocks and shock relocators...

So a 6" drop would need these for sure...

This is what I have done, but I'd really like to drop it another inch...or two. Geeze, it never ends.

72BlckButy · 11-10-2009, 09:02 AM

Once you start you'll never be low enough.

68Stepbed · 11-10-2009, 09:16 AM

With a 6" drop, i would get ECE's Super Track Bar kit. It relocates the panhard bar to get better articulation and proper geometry. I used one with with my 5" rear drop and it's a major ride improvement over the adjustable panhard bar with 4" drop.

www.photobucket.com is your friend for uploading pics. Download them there, then just copy and paste the [IMG] code.

Also, WELCOME to the the board from East TN!

*Shane* · 11-10-2009, 09:52 AM

Quote:

Originally Posted by Tx Firefighter

I've run 6 inch springs on a good number of trucks with no c notch and never had a bottoming issue either.

I agree. No need for a C-notch with a 6" or less drop.

Longhorn Man · 11-10-2009, 05:50 PM

my bad. I forget that a burb is a tad heavier in the back. I put 4 inch drop springs, and had an inch between the frame and axle. Sitting on the tailgate (I'm only 205 - 210 pounds) would slam the axle into the frame.

resto_rookie · 11-10-2009, 07:24 PM

Quote:

Originally Posted by 68Stepbed

With a 6" drop, i would get ECE's Super Track Bar kit. It relocates the panhard bar to get better articulation and proper geometry. I used one with with my 5" rear drop and it's a major ride improvement over the adjustable panhard bar with 4" drop.

www.photobucket.com is your friend for uploading pics. Download them there, then just copy and paste the [IMG] code.

Also, WELCOME to the the board from East TN!

Thanks I'll use that and try to get my build thread started this weekend

brad_man_72 · 11-11-2009, 08:50 PM

6" springs, great when the truck is empty. i do a little towing and hauling id like to pick up some air shocks or bag it. i ride the crap out of the umpstops when the truck is loaded, it doesnt ride horrible but id like the unloaded ride when im towing.

68Stepbed · 11-12-2009, 09:03 AM

brad man, nice truck and nice boat!!

11-08-2009, 01:40 AM	#1
resto_rookie Registered User Join Date: Oct 2009 Location: Hardinsburg, KY Posts: 61	Best rear drop? Working on my first '72 project and wanting to know which rear drop would be best for ride quality. 6" drop coils or 2" blocks and 4" coils?

11-08-2009, 02:12 AM	#2
powell72 Senior Member Join Date: Jan 2005 Location: Loveland Co. Posts: 3,098	Re: Best rear drop? First off, welcome. I don't believe there is a difference in ride between the two, I've had a truck dropped 4'' in the rear and one dropped 6'' and didn't notice a difference. I'd go for the 6'' springs since the springs are the same price and then you don't need to spend money on the blocks. __________________ Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html

11-08-2009, 02:23 AM	#3
resto_rookie Registered User Join Date: Oct 2009 Location: Hardinsburg, KY Posts: 61	Re: Best rear drop? Thanks

11-08-2009, 08:20 AM	#4
big_al_71 Registered User Join Date: Jun 2008 Location: South Florida Posts: 11,375	Re: Best rear drop? welcome and for sure go with 6 inch rear springs forget about the blocks.... __________________ Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild

11-08-2009, 09:11 AM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Best rear drop? you'll want to plan on a c notch in there too. the axle will probably slam into the frame a lot Last edited by Longhorn Man; 11-08-2009 at 05:25 PM.

11-08-2009, 10:52 AM	#6
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Best rear drop? dont forget shock relocators and adjustable panhard//i like to use new trailing arm bushuings too __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

11-09-2009, 02:37 PM	#7
resto_rookie Registered User Join Date: Oct 2009 Location: Hardinsburg, KY Posts: 61	Re: Best rear drop? I was wondering about the c notch and forgot to ask earlier. Is the adjustable panhard a must have? I've got it completely apart and was gonna do the bushings, just trying to get a complete list together so I know what to order.

11-09-2009, 02:41 PM	#8
lks dcvn Registered User Join Date: Jan 2007 Location: Columbus, Ohio Posts: 4,343	Re: Best rear drop? a 4" drop would be better with an adjustable panhard bar, drop shocks and shock relocators... So a 6" drop would need these for sure...

11-09-2009, 03:07 PM	#9
Mike J vw guy & now c-10 guy Join Date: Sep 2008 Location: Louisville,KY Posts: 483	Re: Best rear drop? Im doing a 7" drop in the rear with 5" springs and 2" blocks. Adjustable panhard bar, drop shocks, shock relocater kit, c-notches, and drop center crossmember-- BUT I havent started on the rear yet- just got the front end together yesterday (5.5" drop) 3" springs and 2.5" drop spindles. I bought my truck somewhere around Hardinsburg btw lol Good to see another KY guy on here! Good luck man! __________________ '68 long fleet Finally made some progress on the build!!! My Build Thread

11-09-2009, 03:38 PM	#10
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: Best rear drop? As with many posted above... just run the 6" spring. It's what I installed on my '69 (w/o a notch) and I have yet to bottom out. __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

11-09-2009, 05:47 PM	#11
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Best rear drop? I've run 6 inch springs on a good number of trucks with no c notch and never had a bottoming issue either. __________________ I'm on the Instagram- @Gearhead_Kevin Last edited by Tx Firefighter; 11-09-2009 at 05:47 PM.

11-09-2009, 07:28 PM	#13
resto_rookie Registered User Join Date: Oct 2009 Location: Hardinsburg, KY Posts: 61	Re: Best rear drop? I appreciate all the info. Like I said first build so I'll probably have a million more questions. Soon as I figure out how I'll get a build thread started so you can see what I'm working with. Haven't figured out the pic upload yet

11-10-2009, 09:02 AM	#15
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: Best rear drop? Once you start you'll never be low enough. __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

11-10-2009, 09:16 AM	#16
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: Best rear drop? With a 6" drop, i would get ECE's Super Track Bar kit. It relocates the panhard bar to get better articulation and proper geometry. I used one with with my 5" rear drop and it's a major ride improvement over the adjustable panhard bar with 4" drop. www.photobucket.com is your friend for uploading pics. Download them there, then just copy and paste the [IMG] code. Also, WELCOME to the the board from East TN! __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

11-10-2009, 05:50 PM	#18
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Best rear drop? my bad. I forget that a burb is a tad heavier in the back. I put 4 inch drop springs, and had an inch between the frame and axle. Sitting on the tailgate (I'm only 205 - 210 pounds) would slam the axle into the frame.



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11-11-2009, 08:50 PM	#20
brad_man_72 the boat guy Join Date: Jul 2007 Location: springfield mo Posts: 2,339	Re: Best rear drop? 6" springs, great when the truck is empty. i do a little towing and hauling id like to pick up some air shocks or bag it. i ride the crap out of the umpstops when the truck is loaded, it doesnt ride horrible but id like the unloaded ride when im towing. Attached Images __________________ 67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project,

11-12-2009, 09:03 AM	#21
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: Best rear drop? brad man, nice truck and nice boat!! __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

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