12 Bold Chevy & Dana 60 Rear

V10nacuda · 02-27-2010, 04:21 PM

Just curious on the reliability of a 12 Bolt chevy in a heavy car like SS/EA or similar weights running 9.50's to 9.0's. I bought a mopar with a 12 bolt that has good parts that ran in EA. The car is now getting a B1 Motor with about 850hp. I am wondering if the 12 bolt will be an issue. I'm guessing that the car without any weight bars will weigh AT LEAST 3500# with me in it.

I know some of you SS guys use the 12 bolt over the Dana or 9in to save weight & parasitic loss.

Looking for some input.

Thanks

V10

Jim Wahl · 02-27-2010, 09:06 PM

Jim Kinnett used a Chevy 12 bolt in his 68' Cuda Pro Stocker for several years with success.With the availability of even more modern, better quality parts I would think it would hold up fine. Jim

Myron Piatek · 02-27-2010, 09:11 PM

Quote:

Originally Posted by Jim Wahl

Jim Kinnett used a Chevy 12 bolt in his 68' Cuda Pro Stocker for several years with success.Jim

Wasn't that an SS/AA Cuda before he got into Pro Stock?

Geerhead55 · 02-27-2010, 11:19 PM

Yes,,,Jim's Cuda was a SS/AA in the old days with a 12 bolt. There are plenty of shots of the car in old Super Stock and Drag Illustrated magazines. We thought it was wierd at the time, but he claimed the 12 bolt was lighter and more efficient than a Dana 60 or a 9 in. Danny Durham

John Leichtamer Jr · 02-28-2010, 02:25 AM

Use the Moser Housing 12 bolt. A quality rear end Casting alot heavier.

Hammer

V10nacuda · 03-02-2010, 10:03 AM

THanks for the input. I think I will add a cast girdle cover & try it out. The car has 5.13's in it now so I'll try some 1/8 mile hits to see if it holds up. If it stays togeather I'll probably swap for the 4.56 Pro gear. (foot braking).

Thanks
V10

Tom Goldman · 03-04-2010, 04:40 PM

Quote:

Originally Posted by Geerhead55

Yes,,,Jim's Cuda was a SS/AA in the old days with a 12 bolt. There are plenty of shots of the car in old Super Stock and Drag Illustrated magazines. We thought it was wierd at the time, but he claimed the 12 bolt was lighter and more efficient than a Dana 60 or a 9 in. Danny Durham

My Uncle owned the old DeFrank and Cohen SS/AA Cuda many years ago. ....We used to take out the 9" and put in a 12 bolt when he needed to go fast. ....at that time, [mid '80's] the 12 bolt was worth almost .05-.08 secs..........as far as I remember we never hurt the 12 bolt. ....Tom

Rich Biebel · 03-04-2010, 06:41 PM

John Friel also used a 12 bolt in his SS/AA Dart......He was running low 9's back then. I think it's pretty common thinking that the 12 bolt is quicker than a Ford or Dana.....

02-27-2010, 04:21 PM	#1
V10nacuda Junior Member Join Date: Jun 2005 Location: Erie PA Posts: 3 Likes: 0 Liked 0 Times in 0 Posts	12 Bold Chevy & Dana 60 Rear Just curious on the reliability of a 12 Bolt chevy in a heavy car like SS/EA or similar weights running 9.50's to 9.0's. I bought a mopar with a 12 bolt that has good parts that ran in EA. The car is now getting a B1 Motor with about 850hp. I am wondering if the 12 bolt will be an issue. I'm guessing that the car without any weight bars will weigh AT LEAST 3500# with me in it. I know some of you SS guys use the 12 bolt over the Dana or 9in to save weight & parasitic loss. Looking for some input. Thanks V10

02-27-2010, 09:06 PM	#2
Jim Wahl Veteran Member Join Date: Jan 2002 Location: Central Florida Posts: 5,844 Likes: 668 Liked 683 Times in 129 Posts	Re: 12 Bold Chevy & Dana 60 Rear Jim Kinnett used a Chevy 12 bolt in his 68' Cuda Pro Stocker for several years with success.With the availability of even more modern, better quality parts I would think it would hold up fine. Jim __________________ Jim Wahl....NHRA #2239 S/SS - IHRA # 8 Stock, D2 Stock Champion (forever I guess) 2019 Baby Gators Stock Champion 2009 NHRA D2 National Open Stock Champion 1982 NHRA D2 West Palm Beach LDRS SS Runner Up Past President, Southern Stock / Super Stock Association.

02-27-2010, 11:19 PM	#4
Geerhead55 VIP Member Join Date: Sep 2002 Location: Tacoma, Washington Posts: 1,632 Likes: 0 Liked 5 Times in 5 Posts	Re: 12 Bold Chevy & Dana 60 Rear Yes,,,Jim's Cuda was a SS/AA in the old days with a 12 bolt. There are plenty of shots of the car in old Super Stock and Drag Illustrated magazines. We thought it was wierd at the time, but he claimed the 12 bolt was lighter and more efficient than a Dana 60 or a 9 in. Danny Durham

02-28-2010, 02:25 AM	#5
John Leichtamer Jr Senior Member Join Date: Sep 2006 Location: Orange City Fl Posts: 764 Likes: 0 Liked 0 Times in 0 Posts	Re: 12 Bold Chevy & Dana 60 Rear Use the Moser Housing 12 bolt. A quality rear end Casting alot heavier. Hammer

03-02-2010, 10:03 AM	#6
V10nacuda Junior Member Join Date: Jun 2005 Location: Erie PA Posts: 3 Likes: 0 Liked 0 Times in 0 Posts	Re: 12 Bold Chevy & Dana 60 Rear THanks for the input. I think I will add a cast girdle cover & try it out. The car has 5.13's in it now so I'll try some 1/8 mile hits to see if it holds up. If it stays togeather I'll probably swap for the 4.56 Pro gear. (foot braking). Thanks V10

03-04-2010, 06:41 PM	#8
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,315 Likes: 25 Liked 544 Times in 213 Posts	Re: 12 Bold Chevy & Dana 60 Rear John Friel also used a 12 bolt in his SS/AA Dart......He was running low 9's back then. I think it's pretty common thinking that the 12 bolt is quicker than a Ford or Dana..... __________________ Rich Biebel S/C 1479 Stock 147R