Lowering springs for C/10 & C/20???? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

HotRod929 · 01-16-2003, 04:42 PM

I want to lower my 1970 C20 about 3 inces in the front with springs...I was wondering if I can use lowering springs for a C10 in my C20? Will they fit and if so will it sofen up the ride a little? Also I want to install a flip kit for the rear and was wondering if a flip kit for 73 and up trucks would work? Thanks

HotRod

special70gmc · 01-16-2003, 05:34 PM

the 1/2 ton springs are the same and will fit perfict. not sure bout the flip?

HotRod929 · 01-17-2003, 02:59 AM

Thanks for the help. Anyone know weather the flip kit will work?

HotRod

Longhorn Man · 01-17-2003, 11:54 AM

I'm asuming you have leaf springs out back?
Flag down crazy longhorn or PM him...I think he did this before ripping out his 3/4 ton stuff.

crazy longhorn · 01-17-2003, 06:35 PM

The rear drop on my longhorn was done at the same time that the suspension was changed to 1/2ton parts. I have tossed the helper leaf, & 3 bottom leafs. The 12 bolt axle was then set up with direct connection spring pads, & flipped over the spring. U bolts & brackets are a 67 ford truck item. After the flip, the axle set too low, & the spring perches were moved down on the frame 1 1/4" to raise the truck back up a bit. The rear hangers have an added 3x3x 3/16 angle bracket to keep them from flexing,& a set of slapper bars were added to control wheel hop. I have roughly a 5" drop at the rear, no C notch,& 2 3/4" clearance tween the axle & frame. I have never bottomed the axle on the frame, but for hauling, you will be very limited. On front, you can run a 3 " drop spring, but most guys will tend to agree that a 2" spring is about max if you want to keep front geometry as it should be. My truck was done several years ago, when there just werent any bolt on pcs available......not even springs. The fronts were a new set (lightest available),& have 1 full ring cut off. along with the shorter springs, I have trimmed the bump stops on the lower a arms,& use a traction bar "snubber"for bump stops on both the upper & lower arms. i have also fabbed brackets to relocate the top end of the shocks, & run stock lenght Monroe gas shocks. You can opt for shorter shocks, or Turner Enterprises sells a shock relocator for the fronts for about$45. Good luck....crazyL

01-16-2003, 04:42 PM	#1
HotRod929 Registered User Join Date: Mar 2002 Location: Bondurant, IA but in Worcester, MA for school Posts: 767	Lowering springs for C/10 & C/20???? I want to lower my 1970 C20 about 3 inces in the front with springs...I was wondering if I can use lowering springs for a C10 in my C20? Will they fit and if so will it sofen up the ride a little? Also I want to install a flip kit for the rear and was wondering if a flip kit for 73 and up trucks would work? Thanks HotRod __________________ 1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/

01-16-2003, 05:34 PM	#2
special70gmc Registered User Join Date: Sep 2002 Location: long island, new york Posts: 1,333	the 1/2 ton springs are the same and will fit perfict. not sure bout the flip? __________________ 1986 c-10 swb 5/7 drop 20'' coys 1958 belair 2door

01-17-2003, 02:59 AM	#3
HotRod929 Registered User Join Date: Mar 2002 Location: Bondurant, IA but in Worcester, MA for school Posts: 767	Thanks for the help. Anyone know weather the flip kit will work? HotRod __________________ 1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/

01-17-2003, 06:35 PM	#5
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	The rear drop on my longhorn was done at the same time that the suspension was changed to 1/2ton parts. I have tossed the helper leaf, & 3 bottom leafs. The 12 bolt axle was then set up with direct connection spring pads, & flipped over the spring. U bolts & brackets are a 67 ford truck item. After the flip, the axle set too low, & the spring perches were moved down on the frame 1 1/4" to raise the truck back up a bit. The rear hangers have an added 3x3x 3/16 angle bracket to keep them from flexing,& a set of slapper bars were added to control wheel hop. I have roughly a 5" drop at the rear, no C notch,& 2 3/4" clearance tween the axle & frame. I have never bottomed the axle on the frame, but for hauling, you will be very limited. On front, you can run a 3 " drop spring, but most guys will tend to agree that a 2" spring is about max if you want to keep front geometry as it should be. My truck was done several years ago, when there just werent any bolt on pcs available......not even springs. The fronts were a new set (lightest available),& have 1 full ring cut off. along with the shorter springs, I have trimmed the bump stops on the lower a arms,& use a traction bar "snubber"for bump stops on both the upper & lower arms. i have also fabbed brackets to relocate the top end of the shocks, & run stock lenght Monroe gas shocks. You can opt for shorter shocks, or Turner Enterprises sells a shock relocator for the fronts for about$45. Good luck....crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

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01-17-2003, 11:54 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	I'm asuming you have leaf springs out back? Flag down crazy longhorn or PM him...I think he did this before ripping out his 3/4 ton stuff.



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