68' K10 rear spring question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68lwb · 08-13-2005, 09:21 AM

My truck is a 68 and doesn't have the right springs. I also have a 72' 4x4 for parts. From what I have read on here and in parts books I believe there is a difference between the 68' springs and 72. Does anybody know what is different, or if they will fit?
Thanks

**JIMs70GMC** · 08-13-2005, 10:40 AM

the diference is the location of the spring centering pin. i.e. the axle is not located close to the center of the spring front to rear, the 72 springs are.

**JIMs70GMC** · 08-18-2005, 09:53 PM

Your welcome!

Superron21 · 08-20-2005, 06:14 PM

hey my '68 rear springs are 56 inches long and '72s are 52 inch right?

**JIMs70GMC** · 08-20-2005, 10:03 PM

yep, but those 56" springs(68) are not the same as the 73 and up 56" rear spring on some high GVWR 3/4 ton trucks.

Superron21 · 08-22-2005, 08:36 AM

yeah, i know. my truck only has 2 rear leaves in its spring pack and i dont need alot of weight bearing capacity because the only thing i ever tow is my fishin boat. it rides like a caddy. most people who see my truck assume it rides rough and cant believe how compliant it is. i had a '71 GMC 3/4ton 4x4 and it road like a steamroller unless it was loaded. so, can i use the later model springs on mine for a lift or should i keep my springs and do a shackle flip?

Pont · 08-25-2005, 07:11 PM

You won't be able to use the later springs on your 68 because of the centering pin location. It is dead center on your 68, and off-set towards the front shackle on the later model springs. You would have to relocate the spring hangers (to keep your axle centered in the wheel opening) to use the later springs.

Musclerodz · 08-25-2005, 11:20 PM

ORD or Off Road Design makes a zero rate leaf with multiple hole locations to move your axle on the leaf either 1" or 1 1/2". It will add 1" of height to the rear when installing these. They work great for centering the axle and taking the rear droop out of a 69-72 Blazer

Mike

08-13-2005, 09:21 AM	#1
68lwb Registered User Join Date: Dec 2003 Location: Northern Indiana Posts: 85	68' K10 rear spring question My truck is a 68 and doesn't have the right springs. I also have a 72' 4x4 for parts. From what I have read on here and in parts books I believe there is a difference between the 68' springs and 72. Does anybody know what is different, or if they will fit? Thanks

08-13-2005, 10:40 AM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	the diference is the location of the spring centering pin. i.e. the axle is not located close to the center of the spring front to rear, the 72 springs are. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

08-18-2005, 09:53 PM	#3
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Your welcome! __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

08-20-2005, 10:03 PM	#5
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	yep, but those 56" springs(68) are not the same as the 73 and up 56" rear spring on some high GVWR 3/4 ton trucks. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

08-22-2005, 08:36 AM	#6
Superron21 DONT TRY THIS AT HOME! Join Date: Mar 2005 Location: East Tennessee Posts: 119	yeah, i know. my truck only has 2 rear leaves in its spring pack and i dont need alot of weight bearing capacity because the only thing i ever tow is my fishin boat. it rides like a caddy. most people who see my truck assume it rides rough and cant believe how compliant it is. i had a '71 GMC 3/4ton 4x4 and it road like a steamroller unless it was loaded. so, can i use the later model springs on mine for a lift or should i keep my springs and do a shackle flip? Last edited by Superron21; 08-22-2005 at 10:29 AM. Reason: forgot sumthin

08-20-2005, 06:14 PM	#4
Superron21 DONT TRY THIS AT HOME! Join Date: Mar 2005 Location: East Tennessee Posts: 119	hey my '68 rear springs are 56 inches long and '72s are 52 inch right?

08-25-2005, 07:11 PM	#7
Pont I need another Barley Pop Join Date: Feb 2001 Location: Grants Pass, OR Posts: 1,629	You won't be able to use the later springs on your 68 because of the centering pin location. It is dead center on your 68, and off-set towards the front shackle on the later model springs. You would have to relocate the spring hangers (to keep your axle centered in the wheel opening) to use the later springs. __________________ 67 Short Fleet 4x4 04 Honda CRF450R 89 Toyota 4-Runner 34 Ford 2 door sedan - Long term project ---------------------------------------------- There is a very fine line between "hobby" and "mental illness" Last edited by Pont; 08-25-2005 at 07:12 PM.

08-25-2005, 11:20 PM	#8
Musclerodz Senior Member Join Date: Aug 2005 Location: OKC, OK Posts: 2,364	ORD or Off Road Design makes a zero rate leaf with multiple hole locations to move your axle on the leaf either 1" or 1 1/2". It will add 1" of height to the rear when installing these. They work great for centering the axle and taking the rear droop out of a 69-72 Blazer Mike __________________ Mike Redpath



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