12 bolt - factory installed?

67rag396 · Poncho Master!

RE: 12 bolt - factory installed?

Beaumont4008 · Uber Guru

Carl Stevenson wrote:

Seems to be no rhyme or reason though. There is a 69 Chevelle hardtop here in town. It was stone stock when he bought it, 350, TH350 and a 12 bolt.

Did it have the F40 option ?

Explains Freds car, His has the F40 option .

-- Edited by Beaumont4008 on Saturday 19th of September 2009 12:07:35 AM

4SPEED427 · A Poncho Legend!

1965CS wrote:

I wish that mine had a 12 bolt.... Originally 283 and the 10 bolt with only one upper arm really sucks for handling, especially on dips in the road. Hopefully some day I can find a 12 and do the exchange.

Are you saying your Custom Sport has only one upper arm? It's been a long time since I was under a B body but I was sure they have two upper arms. Are you thinking of what they call the panhard bar that runs from the axle tube over to the frame maybe?

gparis7 · Canadian Poncho Superstar!

My 65 Parisienne convt with standard suspension and 283 had a 10 bolt rear and one upper control arm. My US built 68 Impala 307 had the same setup.

-- Edited by gparis7 on Saturday 19th of September 2009 10:43:20 PM

4SPEED427 · A Poncho Legend!

Ok, I must have been away from B bodies too long then!!!

I don't doubt you guys. You both seem to know your B bodies.

427carl · A Poncho Legend!

Carl Stevenson wrote:

1965CS wrote:

I wish that mine had a 12 bolt.... Originally 283 and the 10 bolt with only one upper arm,
Are you saying your Custom Sport has only one upper arm? It's been a long time but I was sure they have two upper arms. Are you thinking of what they call the panhard bar that runs from the axle tube over to the frame maybe?

rabbit64cs · Canadian Poncho Superstar!

[My 65 Parisienne convt with standard suspension and 283 had a 10 bolt rear and one upeer control arm. My US built 68 Impala 307 had the same setup]

that is the stock setup , high horse may have gotten the second upper control arm, panhard bar is on all.

2drpost · Uber Guru

i've seen b-body 10 bolts with 1 upper arm and 2 upper arms.

'69 safari i just parted had a 10 bolt with 2 uppers.

gparis7 · Canadian Poncho Superstar!

69 belair wrote:

i've seen b-body 10 bolts with 1 upper arm and 2 upper arms.

'69 safari i just parted had a 10 bolt with 2 uppers.

Same with the 3 67-68 biscayne wagons I parted, all 10 bolts, all with 4 arms.

4SPEED427 · A Poncho Legend!

On our way to the lake yesterday we drove past a shop that had a freshly painted 66 Grande Parisienne 2 dr ht on the yard. Of course we had to turn around and look. I had forgotten all about this thread until I started looking under the car. Looked to be the original small block, powerglide with a 12 bolt. Then it hit me! How many upper arms??? Sure enough, 2 of them.....

I still vote 2.

Anyone have a picture of a 65-70 B body with only 1 upper? Which side is it on?

-- Edited by Carl Stevenson on Sunday 20th of September 2009 08:20:39 PM

2drpost · Uber Guru

carl, 12 bolts have 2 upper arms.

the single upper arm 10 bolts had the arm on the right side.

Beaumont4008 · Uber Guru

The 69 Parisienne that was beeing stripped yesterday was also a 350 two barrel Auto with a 12 bolt with two upper control arms.

1965CS · Guru

427carl wrote:

Carl Stevenson wrote:

1965CS wrote:

I wish that mine had a 12 bolt.... Originally 283 and the 10 bolt with only one upper arm,
Are you saying your Custom Sport has only one upper arm? It's been a long time but I was sure they have two upper arms. Are you thinking of what they call the panhard bar that runs from the axle tube over to the frame maybe?

Yes, that is how mine was built and I assume it was the norm. But as I understand from research that I have done, (of course not set in stone tho...) the full size only had 2 upper arms if they had the 327 or larger, unless factory ordered with different rear end. Mine was originally 283 with the basic or standard rear end 3:08 ratio? ... I think..... I don't recall what my first 327-250hp CS rag in 78' had....wish I could remember....age sucks! What is the "panhard" bar?

-- Edited by 1965CS on Monday 28th of September 2009 11:32:16 AM

1965CS · Guru

67rag396 wrote:

1965CS wrote:

I wish that mine had a 12 bolt.... Originally 283 and the 10 bolt with only one upper arm really sucks for handling, especially on dips in the road. Hopefully some day I can find a 12 and do the exchange.

Pretty sure we can make this happen if you really want.
I have a couple if we do it soon.

Rick

Rick, As we discussed, I would be glad to get one from you but I only really need the left upper control arm, if possible. Timing is lousy for me right now, busy with work and other commitments etc, but would the weekend of 9-10 Oct work? The week following that I am gone to Chicago and other things....

67Poncho · Uber Guru

Maybe this will help a little.........

R end.JPG

1965CS · Guru

67Poncho wrote:

Maybe this will help a little.........

Better, thanks!

Not a great pic, but if you look close you can see that there is no upper arm on the left side.

4SPEED427 · A Poncho Legend!

But that is the panhard bar.

We are talking about the upper arm, U shaped channel that runs forward and up from the diff. Unless I am looking wrong at what you have circled.

1965CS · Guru

Due to the dark picture it is tough to see the upper arm. It's directly above where the panhard bolts on. I can try to get a shot of my own set up and post here.

Beaumont4008 · Uber Guru

This is for a 69 but still shows the left as only for heavy duty and wagons.

4SPEED427 · A Poncho Legend!

I am thinking that I have only ever had HD suspension cars. Is that possible?

True, a number of them have been big blocks which likely all have 2 uppers.

67Poncho · Uber Guru

Carl Stevenson wrote:

But that is the panhard bar.

We are talking about the upper arm, U shaped channel that runs forward and up from the diff. Unless I am looking wrong at what you have circled.

No, no Carl. I know what he means as I have seen the one upper arm as well.... I revamped the picture... The square boxes......... The right one with, the left one without!!!

R end.JPG

gparis7 · Canadian Poncho Superstar!

The light duty cars had one upper on the right above the panhard bar; the HD cars had two. I installed a 4 arm 12 bolt in place of a 3 arm 10 bolt in a 68 Impala.

427carl · A Poncho Legend!

67Poncho wrote:

Carl Stevenson wrote:

We are talking about the upper arm, U shaped channel that runs forward and up from the diff. Unless I am looking wrong at what you have circled.

No, no Carl. I know what he means as I have seen the one upper arm as well.... I revamped the picture... The square boxes......... The right one with, the left one without!!!

I see it? and still can't believe it? My car has 12 bolt and 4 arms WHY would they even bother to make a 3? paper work alone would ruin cost saving unbelievable... disbelief

4SPEED427 · A Poncho Legend!

Carl, what rear end and suspension (F40, or....?) did your car have originally?

1965CS · Guru

Pics of my set up with no upper left and one upper right.

-- Edited by 1965CS on Wednesday 30th of September 2009 05:43:49 PM