The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

Pyrotechnic · 05-23-2011, 09:02 PM

My dad researched this some time ago and I believe the conclusion was that the spring perches were a different width and it was not bolt in. Not sure about track width though.

The correct rear ends for these trucks are pretty common and keep in mind that a Suburban rear will work too. You can probably find one that is in good enough shape to run for a decent price.

Of course if you have a welder and some time to relocate the spring perches and shock mounts, then the free 10 bolt is probably the cheapest route. Especially if it has some desirable gears or a posi. Just make sure the track width will work under the truck.

05-23-2011, 09:02 PM	#3
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: 12 bolt to 10 bolt swap? My dad researched this some time ago and I believe the conclusion was that the spring perches were a different width and it was not bolt in. Not sure about track width though. The correct rear ends for these trucks are pretty common and keep in mind that a Suburban rear will work too. You can probably find one that is in good enough shape to run for a decent price. Of course if you have a welder and some time to relocate the spring perches and shock mounts, then the free 10 bolt is probably the cheapest route. Especially if it has some desirable gears or a posi. Just make sure the track width will work under the truck. __________________ 1977 GMC Sierra Grande Last edited by Pyrotechnic; 05-23-2011 at 09:04 PM.