63-66 C10 and C20 leaf springs same size - The 1947 - Present Chevrolet & GMC Truck Message Board Network

siggyfreud · 05-04-2016, 09:11 PM

Hey all,

Looking to order a drop set for my rear leaf springs. Came across this:

https://www.performanceonline.com/19...ront-and-Rear/

It's for a 63-72 C10, but my question is are the leafs used for the C20 the same length? I know they're the same width as what is in there now, but not sure on the length. Mine currently appear to be about 52", but that end to end, not eye to eye.

Any thoughts on if these would work?

siggyfreud · 05-05-2016, 05:52 PM

Anyone have any thoughts on this? Guess I need to know the right way to measure these if someone can't verify that the C10/C20 lengths are the same.

padresag · 05-05-2016, 06:12 PM

the link that you have goes to anti sway bars.
are you talking rear leaf springs for a GMC. springs are built for a weight capacity and usually 1/2 and 3/4 t are different. there are optional gvws within the classifications also
ron

siggyfreud · 05-05-2016, 06:28 PM

Whoops:

https://www.performanceonline.com/19...ring-Set-Rear/

Yeah, I imagine the C20 springs were stiffer and could carry more load, but I'm less concerned with that since it's not going to be hauling anything in the bed other than an appliance or something from time to time. More concerned with the physical dimensions and whether the C10 sprints would physically fit. I suppose worse case I could drill out the rivets of the leaf perches and move them, but seems like a pain if it can be avoided.

padresag · 05-05-2016, 09:02 PM

check the pin sizes
ron

siggyfreud · 05-05-2016, 11:53 PM

You talking about the diameter of the bolts that go through the spring eyes?

padresag · 05-06-2016, 12:12 AM

spring pins, shackle pins and bushings. some would call them bolts.
I imagine that they are rubber on 2 wheel drive
ron

**Captainfab** · 05-06-2016, 12:40 AM

I have a '66 GMC 1000 frame with the rear springs intact than I can measure tomorrow.

**Captainfab** · 05-07-2016, 12:16 AM

I measured the springs on my '66 GMC 1000 frame. They are 52" long and 2.25" wide with 9 leafs.

siggyfreud · 05-07-2016, 01:36 AM

Okay, mine are 2.25" wide and I think they're 52" long. From what I know they were either 52" or 56". I don't imagine they had like a 52.5 or something like that. When I measure end to end I get 52", but when I measure eye to eye it's a little less than that.

05-04-2016, 09:11 PM	#1
siggyfreud Registered User Join Date: Jun 2012 Location: Portland Posts: 1,330	63-66 C10 and C20 leaf springs same size Hey all, Looking to order a drop set for my rear leaf springs. Came across this: https://www.performanceonline.com/19...ront-and-Rear/ It's for a 63-72 C10, but my question is are the leafs used for the C20 the same length? I know they're the same width as what is in there now, but not sure on the length. Mine currently appear to be about 52", but that end to end, not eye to eye. Any thoughts on if these would work? __________________ Current Build - Project "Ghost of Poseidon" 72 C10 Pro-touring build Previous Build - 66 GMC Pro-touring build. Sold.

05-05-2016, 05:52 PM	#2
siggyfreud Registered User Join Date: Jun 2012 Location: Portland Posts: 1,330	Re: 63-66 C10 and C20 leaf springs same size Anyone have any thoughts on this? Guess I need to know the right way to measure these if someone can't verify that the C10/C20 lengths are the same. __________________ Current Build - Project "Ghost of Poseidon" 72 C10 Pro-touring build Previous Build - 66 GMC Pro-touring build. Sold.

05-05-2016, 06:12 PM	#3
padresag Registered User Join Date: Feb 2008 Location: Sidney,b.c. Posts: 4,425	Re: 63-66 C10 and C20 leaf springs same size the link that you have goes to anti sway bars. are you talking rear leaf springs for a GMC. springs are built for a weight capacity and usually 1/2 and 3/4 t are different. there are optional gvws within the classifications also ron

05-05-2016, 06:28 PM	#4
siggyfreud Registered User Join Date: Jun 2012 Location: Portland Posts: 1,330	Re: 63-66 C10 and C20 leaf springs same size Whoops: https://www.performanceonline.com/19...ring-Set-Rear/ Yeah, I imagine the C20 springs were stiffer and could carry more load, but I'm less concerned with that since it's not going to be hauling anything in the bed other than an appliance or something from time to time. More concerned with the physical dimensions and whether the C10 sprints would physically fit. I suppose worse case I could drill out the rivets of the leaf perches and move them, but seems like a pain if it can be avoided. __________________ Current Build - Project "Ghost of Poseidon" 72 C10 Pro-touring build Previous Build - 66 GMC Pro-touring build. Sold.

05-05-2016, 09:02 PM	#5
padresag Registered User Join Date: Feb 2008 Location: Sidney,b.c. Posts: 4,425	Re: 63-66 C10 and C20 leaf springs same size check the pin sizes ron

05-05-2016, 11:53 PM	#6
siggyfreud Registered User Join Date: Jun 2012 Location: Portland Posts: 1,330	Re: 63-66 C10 and C20 leaf springs same size You talking about the diameter of the bolts that go through the spring eyes? __________________ Current Build - Project "Ghost of Poseidon" 72 C10 Pro-touring build Previous Build - 66 GMC Pro-touring build. Sold.

05-06-2016, 12:12 AM	#7
padresag Registered User Join Date: Feb 2008 Location: Sidney,b.c. Posts: 4,425	Re: 63-66 C10 and C20 leaf springs same size spring pins, shackle pins and bushings. some would call them bolts. I imagine that they are rubber on 2 wheel drive ron

05-06-2016, 12:40 AM	#8
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: 63-66 C10 and C20 leaf springs same size I have a '66 GMC 1000 frame with the rear springs intact than I can measure tomorrow. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

05-07-2016, 12:16 AM	#9
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: 63-66 C10 and C20 leaf springs same size I measured the springs on my '66 GMC 1000 frame. They are 52" long and 2.25" wide with 9 leafs. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

05-07-2016, 01:36 AM	#10
siggyfreud Registered User Join Date: Jun 2012 Location: Portland Posts: 1,330	Re: 63-66 C10 and C20 leaf springs same size Okay, mine are 2.25" wide and I think they're 52" long. From what I know they were either 52" or 56". I don't imagine they had like a 52.5 or something like that. When I measure end to end I get 52", but when I measure eye to eye it's a little less than that. __________________ Current Build - Project "Ghost of Poseidon" 72 C10 Pro-touring build Previous Build - 66 GMC Pro-touring build. Sold.



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