8.5 rear end for 1980 G body GM - Page 2

Bobby Zlatkin · 10-07-2013, 09:19 AM

And don't be fooled by the left hand threads on the ring gear. By the time I realized the deal there, I had them suckers so tight they were almost impossible to get loose.

Oh well. As they say "live & learn".

CrateCamaro · 10-08-2013, 12:08 AM

I don't know about you guys but around here 8.5 10 bolts for G body are like hens teeth. I found a mint one in a scrap pile but that was sheer luck. And the fact that it came out of a friends turbo regal to install a 9 inch ford was even better for me. Probably cheaper and way easier to just go with a Strange or Mosier 12 Bolt. Way better tooling, thicker case, thicker tubes. All around better piece. Probably wouldn't matter in a stocker but gear selection for a 12 bolt is better then a 10 Bolt as well.

Greg Reimer 7376 · 10-09-2013, 10:57 PM

Seems to me that QA-1 offers adjustible upper trailing arms that have an offset for the purpose of installing an A body 12 bolt in a later G body car as a bolt-in.I bought stronger trailing arms for my '68 Chevelle wagon from them and got a catalog someplace. Their stuff is pretty nice, as well. While a 12 bolt is getting rather pricey, there is an excellent selection of gears and a small block car probably can't break it. Also I think someone makes an aftermarket bolt in 12 bolt housing now for the A body.

Logus · 10-10-2013, 10:05 AM

12 bolt A body rear in a G body. 2 more Cos. that make the rear arms.
Probably easier in the long run, than finding a GN 10 bolt laying around.

http://www.maliburacing.com/iceman/

http://umiperformance.com/catalog/in...&cPath=8_60_68

Lyn Smith · 10-10-2013, 11:55 AM

How much wider is a 70s 12 bolt or 10 bolt A body rearend than the stock G body rearend? thanks for the info guys.

Lyn Smith · 10-14-2013, 09:59 AM

I found a couple places that make the adapter upper control arms for the G body 12 bolt swap.Do the lower control arms bolt up ok?

10-07-2013, 09:19 AM	#11
Bobby Zlatkin Member Join Date: Mar 2003 Location: Mills River, NC Posts: 417 Likes: 0 Liked 0 Times in 0 Posts	Re: 8.5 rear end for 1980 G body GM And don't be fooled by the left hand threads on the ring gear. By the time I realized the deal there, I had them suckers so tight they were almost impossible to get loose. Oh well. As they say "live & learn". __________________ Bobby & Norene Zlatkin L/SA

10-08-2013, 12:08 AM	#12
CrateCamaro Member Join Date: Nov 2007 Location: Ontario Canada Posts: 411 Likes: 1 Liked 19 Times in 7 Posts	Re: 8.5 rear end for 1980 G body GM I don't know about you guys but around here 8.5 10 bolts for G body are like hens teeth. I found a mint one in a scrap pile but that was sheer luck. And the fact that it came out of a friends turbo regal to install a 9 inch ford was even better for me. Probably cheaper and way easier to just go with a Strange or Mosier 12 Bolt. Way better tooling, thicker case, thicker tubes. All around better piece. Probably wouldn't matter in a stocker but gear selection for a 12 bolt is better then a 10 Bolt as well. __________________ Tony Valerio 1968 Camaro 1700 IHRA H/CM 1701 NHRA SS/?A

10-09-2013, 10:57 PM	#13
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,136 Likes: 172 Liked 705 Times in 219 Posts	Re: 8.5 rear end for 1980 G body GM Seems to me that QA-1 offers adjustible upper trailing arms that have an offset for the purpose of installing an A body 12 bolt in a later G body car as a bolt-in.I bought stronger trailing arms for my '68 Chevelle wagon from them and got a catalog someplace. Their stuff is pretty nice, as well. While a 12 bolt is getting rather pricey, there is an excellent selection of gears and a small block car probably can't break it. Also I think someone makes an aftermarket bolt in 12 bolt housing now for the A body.

10-10-2013, 10:05 AM	#14
Logus Junior Member Join Date: Jan 2010 Posts: 19 Likes: 0 Liked 0 Times in 0 Posts	Re: 8.5 rear end for 1980 G body GM 12 bolt A body rear in a G body. 2 more Cos. that make the rear arms. Probably easier in the long run, than finding a GN 10 bolt laying around. http://www.maliburacing.com/iceman/ http://umiperformance.com/catalog/in...&cPath=8_60_68

10-10-2013, 11:55 AM	#15
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,199 Likes: 282 Liked 967 Times in 194 Posts	Re: 8.5 rear end for 1980 G body GM How much wider is a 70s 12 bolt or 10 bolt A body rearend than the stock G body rearend? thanks for the info guys.

10-14-2013, 09:59 AM	#16
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,199 Likes: 282 Liked 967 Times in 194 Posts	Re: 8.5 rear end for 1980 G body GM I found a couple places that make the adapter upper control arms for the G body 12 bolt swap.Do the lower control arms bolt up ok?