Looking to swapping out the C20 rear end... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

six5 · 03-17-2009, 11:21 PM

I am going to change out my 8 lug bolt pattern to either a 5 lug on my C20. Does anyone know if some of the newer Chevys have close to the same rear end dimensions that will work in my C20?

**Captainfab** · 03-18-2009, 12:11 AM

Quote:

Originally Posted by six5

I am going to change out my 8 lug bolt pattern to either a 5 lug on my C20. Does anyone know if some of the newer Chevys have close to the same rear end dimensions that will work in my C20?

The rear ends that are the easiest are the '71 & '72 12 bolts, but they are 1.5" wider overall. Next would be the '73-'87 12 and 10 bolts which are also 1.5" wider. I have read in another thread here that the Caprice rear ends from ~95-'96 should be the same width as the '63-'66 rear ends. The post says that they are 1-1.5" shorter than a '71 12 bolt. And these do have the 5 x 5" pattern, plus disc brakes! Here's the thread.....
http://67-72chevytrucks.com/vboard/s...=180846&page=2

Have to scroll down thru the page.....there's a couple of posts on it.

jason65 · 03-18-2009, 07:40 AM

My 65 C20 has a 65 C10 rear end. If you do something like that you should get an adjustible panhard bar. The original one will go on but wont line up right. If I could do it again I would have gone with 6 lug.

joe231 · 03-18-2009, 08:43 AM

Quote:

Originally Posted by jason65

My 65 C20 has a 65 C10 rear end. If you do something like that you should get an adjustible panhard bar. The original one will go on but wont line up right. If I could do it again I would have gone with 6 lug.

Jason,
i don't understand............a '65 c-10 is 6 lug.

jason65 · 03-18-2009, 10:06 AM

Yep. I would have converted the front down to 6 and left the back alone.

joe231 · 03-18-2009, 10:08 AM

Oh I see, what rear differential did you use?

six5 · 03-18-2009, 10:58 AM

Thanks for the post guys......

502tripower · 03-18-2009, 11:41 AM

I'm not familiar with the C20 rear ends. Could you order new axels from strange or another company? Don't Know. Another option is to got to a 8" or 9" and use the Explorer rear discs. They come with E Brake brackets and work real well.

jason65 · 03-18-2009, 12:57 PM

Quote:

Originally Posted by joe231

Oh I see, what rear differential did you use?

I don't know, the truck came that way.

From what I've seen there isn't a axle kit for the C20 rear end. You can have a machine shop drill yours and just put some new drums on. Or just put a C10 rearend under her and cradle swap it.

fercho71 · 03-19-2009, 02:22 AM

Jason i just swap the rear end on my truck its a 1966 8 lug c-20 and swap it for a 1963 c-10 6 lug everithing was easy no big problem i conected right

Fer.

six5 · 03-19-2009, 02:34 AM

502 the Explorer would be nice but I need to keep with a chevy bolt pattern. I will hit up the junk yard this week and see what I can come up with........

Thanks for all the reply guys....!!

exmonkeypunk · 04-26-2009, 06:35 PM

so the 95 or 96" caprice 10 bolt is an easy swap for the most part?
I want discs on my 10 bolt but can't seem to figure who sells the parts.

**Captainfab** · 04-26-2009, 11:58 PM

Quote:

Originally Posted by exmonkeypunk

so the 95 or 96" caprice 10 bolt is an easy swap for the most part?
I want discs on my 10 bolt but can't seem to figure who sells the parts.

What year of 10 bolt do you have?

ceruzziracing · 04-27-2009, 01:11 AM

Could always look for a mid/late 70's caddy rear end, already has discs...

exmonkeypunk · 04-27-2009, 11:16 AM

Quote:

Originally Posted by Captainfab

What year of 10 bolt do you have?

I don't have a 10 bolt. I made a noob mistake and counted the cover bolts and assumed 10 bolts meant i had a 10 bolt rear. Now i have some numbers to try to find to figure out what i do have. Dana 60?

Joemomma1 · 04-27-2009, 12:27 PM

I second that 8.8" idea. The late 80's mark VII's had limited slip and disk brakes. They are about 55" wide. Order some axles and your in business. The amount that people want for a chevy posi are crazy.

**Captainfab** · 04-28-2009, 12:01 AM

Quote:

Originally Posted by exmonkeypunk

I don't have a 10 bolt. I made a noob mistake and counted the cover bolts and assumed 10 bolts meant i had a 10 bolt rear. Now i have some numbers to try to find to figure out what i do have. Dana 60?

What year truck do you have? C10 or C20? Do you have a pic of the rear end? If you can give us some more info I may be able to help you find discs for it if they are available.

exmonkeypunk · 04-28-2009, 06:33 PM

I don't mean to hijack this thread, but i'm assuming six5 prolly has the same rear... I found mine to be a dana 60... The truck is a 72' C20. has a 350 with a th350 trans.

**Captainfab** · 04-28-2009, 11:39 PM

Quote:

Originally Posted by exmonkeypunk

I don't mean to hijack this thread, but i'm assuming six5 prolly has the same rear... I found mine to be a dana 60... The truck is a 72' C20. has a 350 with a th350 trans.

No six5 has an Eaton HO52 in his. Let me look ad see if I can find you some caliper brackets. The rotors and calipers are the easy part.

exmonkeypunk · 04-29-2009, 07:09 PM

With a name like Captain Fab, he's gotta be good

03-17-2009, 11:21 PM	#1
six5 Registered User Join Date: Mar 2009 Location: Reno, Nevada Posts: 128	Looking to swapping out the C20 rear end... I am going to change out my 8 lug bolt pattern to either a 5 lug on my C20. Does anyone know if some of the newer Chevys have close to the same rear end dimensions that will work in my C20? __________________ -Dave My 1965 build...http://67-72chevytrucks.com/vboard/s...d.php?t=331302

03-18-2009, 07:40 AM	#3
jason65 Registerd User Join Date: Sep 2008 Location: Oklahoma Posts: 2,118	Re: Looking to swapping out the C20 rear end... My 65 C20 has a 65 C10 rear end. If you do something like that you should get an adjustible panhard bar. The original one will go on but wont line up right. If I could do it again I would have gone with 6 lug. Last edited by jason65; 03-18-2009 at 07:50 AM.

03-18-2009, 10:06 AM	#5
jason65 Registerd User Join Date: Sep 2008 Location: Oklahoma Posts: 2,118	Re: Looking to swapping out the C20 rear end... Yep. I would have converted the front down to 6 and left the back alone.

03-18-2009, 10:08 AM	#6
joe231 Registered User Join Date: Dec 2007 Location: Palmer, Alaska Posts: 13,821	Re: Looking to swapping out the C20 rear end... Oh I see, what rear differential did you use? __________________ *CHEVY ONLY*

03-18-2009, 10:58 AM	#7
six5 Registered User Join Date: Mar 2009 Location: Reno, Nevada Posts: 128	Re: Looking to swapping out the C20 rear end... Thanks for the post guys...... __________________ -Dave My 1965 build...http://67-72chevytrucks.com/vboard/s...d.php?t=331302

03-18-2009, 11:41 AM	#8
502tripower Registered User Join Date: Jan 2008 Location: Satsop, WA Posts: 606	Re: Looking to swapping out the C20 rear end... I'm not familiar with the C20 rear ends. Could you order new axels from strange or another company? Don't Know. Another option is to got to a 8" or 9" and use the Explorer rear discs. They come with E Brake brackets and work real well. __________________ 1963' Chev Custom Cab 502, 67' 435hp 3X2 intake, 9" 4:30 Posi 1961 Impala SS 348/350 4-speed 3:70 Posi 1961 Bel-Air Bubble Top 283 Turboglide soon to have a 348 3X2 4-speed 1950 17' Fairliner twin cockpit barrel stern 312 Y block 1X1 intake Borg Warner 1:1 gear 1957 Fleetform 14' twin cockpit barrel stern 1969 BP-125 Merc 1949 Transitier 3-wheel forklift Crosley 4-Banger 98' FXD 2002 2500HD

03-19-2009, 02:22 AM	#10
fercho71 Registered User Join Date: Jun 2007 Location: sandiego, ca Posts: 453	Re: Looking to swapping out the C20 rear end... Jason i just swap the rear end on my truck its a 1966 8 lug c-20 and swap it for a 1963 c-10 6 lug everithing was easy no big problem i conected right Fer. __________________ 1966 chevy c-20 truck " La Chata " under construccion Last edited by fercho71; 03-19-2009 at 03:21 AM.

03-19-2009, 02:34 AM	#11
six5 Registered User Join Date: Mar 2009 Location: Reno, Nevada Posts: 128	Re: Looking to swapping out the C20 rear end... 502 the Explorer would be nice but I need to keep with a chevy bolt pattern. I will hit up the junk yard this week and see what I can come up with........ Thanks for all the reply guys....!! __________________ -Dave My 1965 build...http://67-72chevytrucks.com/vboard/s...d.php?t=331302

04-26-2009, 06:35 PM	#12
exmonkeypunk Barrito Loco Diablo Join Date: May 2008 Location: Cherry Valley, Illinois Posts: 636	Re: Looking to swapping out the C20 rear end... so the 95 or 96" caprice 10 bolt is an easy swap for the most part? I want discs on my 10 bolt but can't seem to figure who sells the parts.

04-27-2009, 01:11 AM	#14
ceruzziracing Registered User Join Date: Mar 2009 Location: Deland, Florida Posts: 62	Re: Looking to swapping out the C20 rear end... Could always look for a mid/late 70's caddy rear end, already has discs...

04-27-2009, 12:27 PM	#16
Joemomma1 Registered User Join Date: Mar 2009 Location: CA Posts: 813	Re: Looking to swapping out the C20 rear end... I second that 8.8" idea. The late 80's mark VII's had limited slip and disk brakes. They are about 55" wide. Order some axles and your in business. The amount that people want for a chevy posi are crazy.

04-28-2009, 06:33 PM	#18
exmonkeypunk Barrito Loco Diablo Join Date: May 2008 Location: Cherry Valley, Illinois Posts: 636	Re: Looking to swapping out the C20 rear end... I don't mean to hijack this thread, but i'm assuming six5 prolly has the same rear... I found mine to be a dana 60... The truck is a 72' C20. has a 350 with a th350 trans.

04-29-2009, 07:09 PM	#20
exmonkeypunk Barrito Loco Diablo Join Date: May 2008 Location: Cherry Valley, Illinois Posts: 636	Re: Looking to swapping out the C20 rear end... With a name like Captain Fab, he's gotta be good



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