The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1960 - 1966 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-09-2009, 11:17 PM   #1
spr85gmc
Registered User
 
spr85gmc's Avatar
 
Join Date: Jul 2007
Location: san antonio
Posts: 648
12 bolt rear end

i know "SEARCH BUTTON" but keep getting conflicting answers.

Will a 12 bolt rear end out of a 72 c10 fit correctly into my 66gmc with leaf springs? i know its slightly wider but how is that so bad and would I be able to run my rallys off my 85 c10 with a smaller tire for now?
spr85gmc is offline   Reply With Quote
Old 11-10-2009, 01:48 AM   #2
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
Re: 12 bolt rear end

Is that '72 12 bolt setup for leafs or coils? If it is for leafs, that will bolt right up. However you may need to shorten your driveshaft if your original rear end was a Dana 44. You may also have to address differences in the e-brake cables.....not positive on that. Width wise it's only 1.5" overall, so just .750" each side. You should be alright with a small to medium size tire. It also depends on whether your Rally's are 7" wide or 8".

Quote:
Originally Posted by spr85gmc View Post
i know "SEARCH BUTTON" but keep getting conflicting answers.

Will a 12 bolt rear end out of a 72 c10 fit correctly into my 66gmc with leaf springs? i know its slightly wider but how is that so bad and would I be able to run my rallys off my 85 c10 with a smaller tire for now?
__________________
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
Captainfab is offline   Reply With Quote
Old 11-10-2009, 04:24 PM   #3
Roadhammer
Registered User
 
Roadhammer's Avatar
 
Join Date: Aug 2009
Location: Coaldale Alberta
Posts: 174
Re: 12 bolt rear end

So what your saying is that im going to have issues with my 10" wide rallys...

Jory
Roadhammer is offline   Reply With Quote
Old 11-10-2009, 04:33 PM   #4
Slow Build
Registered User
 
Slow Build's Avatar
 
Join Date: Sep 2009
Location: California Delta
Posts: 2,163
Re: 12 bolt rear end

Depends on backspacing.
__________________
Name: Rich
Current Ride: 1964 C-10 Short Fleetside
Daily Driver: 2005 GMC crew cab short fleetside /2001 Chevy Tahoe
Past GM Trucks:
1959 GMC short stepside
1968 GMC short stepside-4x4
1973 Chevy short stepside
1989 Chevy short fleetside-reg cab
1993 Chevy short fleetside-Xcab
2002 Chevy short fleetside-Xcab

Save the dinosaurs, use synthetic oil.
Slow Build is offline   Reply With Quote
Old 11-10-2009, 04:39 PM   #5
Roadhammer
Registered User
 
Roadhammer's Avatar
 
Join Date: Aug 2009
Location: Coaldale Alberta
Posts: 174
Re: 12 bolt rear end

Im planning on swapping the 79 12 bolt into the 63 so that i have 5 lug axles and the other one has been sitting for over 15 years and i dont know it was any good when they parked it.

With the the 10" wide rallys on the 79 rearend it only measured 2" wider than the 63 rearend with skinnies on it.

probably is fine then eh?

Jory
Roadhammer is offline   Reply With Quote
Old 11-10-2009, 10:52 PM   #6
spr85gmc
Registered User
 
spr85gmc's Avatar
 
Join Date: Jul 2007
Location: san antonio
Posts: 648
Re: 12 bolt rear end

well im going to pick it up tomorrow for 30 bucks hope it fits,
spr85gmc is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:03 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com