12-bolt rearend in a 62??

[Kevins62]

Has anyone here ever swapped a 65-70 big car 12-bolt into a 58-64 big car chassis? Is it a fairly easy swap? Thanks, Kevin

[SSpev]

To wide and the brackets are all wrong. It can be done though. I put a 73 Nova 10 under mine. Welded all the brackets myself and made the second upper. Here's a link to a pervious pic I posted

http://www.348-409.com/forum/showthread.php?t=3133

[JimKwiatkowski]

Kevin,Welcome to the site :) If you have a 12 bolt laying not doing nothing,I would have it shortened and weld on the proper brackets.I have two 12 bolts,one in my 57 Chevy and one in my 67 Camaro I :love them.I have not broke any parts yet :D

[SSpev]

If you do shorten them, be sure to use ford 9" ends so you can use bolt in axils.

[Kevins62]

Thanks for the info guys, I have a 12-bolt out of a 65 Impala that i can use. If I use the brackets off of the original rearend, will the 12-bolt fit OK (widthwise) in the 62? How about pinion angle? Are the yokes the same from a drop out to a 12-bolt? Thanks, Kevin

[Tic's60]

Rear end widths in inches

57.75 1962-1964 Chevy II/Nova
57.75 1965-1967 Chevy II/Nova
58.00 1978-1988 Chevy Malibu, Monte Carlo
59.50 1968-1982 Corvette
60.00 1955-1964 Chevy Car
60.00 1967-1969 Camaro
60.25 1968-1979 Chevy II/Nova
60.50 1984-1995 Corvette
60.50 1964-1967 Chevelle
62.00 1955-1959 Chevy Pickup
62.50 1968-1972 Chevelle
62.50 1970-1981 Camaro/Firebird

[JimKwiatkowski]

Kevin,what's wrong with rearend in your 62 and why do want to put a 12 bolt in your 62 :dunno Your looking at alot of work.If you got a bad A$$ 409 in that 62 that likes to twist up alot axles I can understand :D

[Kevins62]

Jim The reason I want to swap is because a 12-bolt is cheaper, stronger, more gear ratios are available, and I can get a spool for a 12-bolt. Kevin

[Mr.Jimmy]

You can get a spool for these too.... what gear are you looking for?? The only one that I could think that one would want is a 3:90. They can be strong. Someone here has a strong on in his bubble... :brow

[gearhead409]

what are you talking about! a spool in what? and what's the deal on the 3.90?

[Kevins62]

I don't want to put any money into the drop out. I'm not going to spend $800 for a new posi unit, or $400 for a 40 year old unit with burned up clutches. Mini spools for a 12-bolt are $75, and a 4 series ring and pinion are $100 at a swap meet. So if there is some way I can make this '65 housing work, I have good strength and reliability for about $300. Just my $.02. Kevin

[JimKwiatkowski]

Kevin,I would measure both rearends and see what the differance is width wise.If you have about 4 inchs difference,you could do it with different wheels, they make wheels with different rear spacing.If your housing has to to shortend you have to buy axles :dunno What ever you decide I can help you on how to insall a 12 bolt.Like I said I installed a 12 bolt in my 57 Chevy with ladder bar suspenison and a 12 bolt with 4 link suspenison in my 67Camaro.So send me a PM or e-mail and I would willing to help on how to install a 12 bolt.

[jim_ss409]

Hopefully the 65 and up axle isn't too much wider because you can run into problems trying to get the wheels on and off. I used to have 275-50 15's on a 64 with a stock rear end and they were a bit tight going on and off. I think it would have been really tight with a wider rear end. This might not be a problem with stock tires and the car might actually look better with a wider rear track width. The front track width of a 62 is wider than the rear (by about an inch I think) I think the car would look beter if the rear was wider.

[JimKwiatkowski]

Besides buying new axles,you will need new housing ends + labor to install ends and a new 1 piece driveshaft or have your 2 piece shortend.That adds up to over $500 :dunno

[SSpev]

65 Full size 63 inches

[JimKwiatkowski]

Tom,do you know what a 62 width is?I think Kevin has gave up on the swap :dunno

[SSpev]

The rear I took out of my 61 is 60 inches to the out side of the drums. Just like Tic's list. I think I remember the 73 Nova rear I replaced it with being about 1/2 inch narrower not a 1/4 wider :dunno I know it looks like there is more room.

[JimKwiatkowski]

Tom,I would say that 65 rear end would work in a 62.Kevin would need different wheels to make up the difference :dunno

[JimKwiatkowski]

Tom,since were the only one's talking here,we have 14 members going to Norwalk Ohio June 3-4-5 to the Blue Suede Cruise.Here's a link :dunno

http://www.gonorwalk.com/bluesuede.html

[SSpev]

yea the 65 rear would fit with some work and the right offset wheels. I think the combo would look funny. :? No dish and wide tires. There is also a reason the dish is in. Load capability. I'm sure it mostly applys to hi horse/ extrem duty apps.

That cruise sounds neet. Would like to go, but I never know what I got going. Besides my cars are UGLY :eek: I drive my 61 through the winter, when its not broke. Needs aconverter right now. My 65 has rust, the 396 is having issues, and the drive train is saginaw/10 bolt open 3.08. The 65 convert is an OLD amature resto that has been diven HARD. Maybe I can show up and not tell anyone ;) Any drag racing?

[SS425HP]

I think Moser sells a 12 bolt rear end with the mounts already welded on for the B body ( ours ). Seems like it was about $485.00. Right width, right mounts. Hard to beat. I'm going to be looking at it. Moser is not far from me. Thinking about going up to see them.

Fred

[JimKwiatkowski]

Moser does very good work,they did both my 12 bolt rearends :)

http://www.moserengineering.com/moser_interior/products.asp?CatID=28

[SS425HP]

Part #: 7H9GM5964
59 - 64 GM/Impala Housing
$510
--------------------------------------------------------------------------------

Click here to close this window and return to the Moser Engineering Products Catalog.

This was the housing I was thinking of. It's the F**D 9". They raised the price from the book I have. Not sure of the GM 12 bolt price. Will check it.

Fred

[SS425HP]

I was at Moser's place, today. They do the F**D 9" for our cars, but don't do a 12 bolt. They have a problem with the housing and the upper mounts. They might do one upper arm, but not two. I looked at some pictures I took last year of a car with a 12 bolt and it has the 2 upper arms, so I know it can be done. It's just how I don't know. We have a member whose car has the 2 upper arms on a 12 bolt. If he wants to tell how he did it, I'm sure we will hear from him.

Fred

[DIV1RACER-2]

Fred & anybody else


If your refering to me here i am. :dunno If you use a 68-72 12 bolt the width is correct to fit a reasonable tire under neath w/ correct rim & tire w/ factory style exhaust system.

I did mine my self / cut the lower brackets off of an old housing & reuse them.
I made upper mounts & welded them to housing w/o removing upper control arm mounts on the chevelle housing. I made two upper control arms from 3/4 inside diameter thickwall tubing & 3/4 x3/4 heim joints. I added the left side frame mount & wala all done!!!!! Sounds easy doesn't it ? Really isn't all that difficult, the most critical parts are the many measurements & angles to get proper pinion angle, control arm width & wheel base position.

Using good internals & properly setup gear set it will take some serious pounding! I have raced these rears for 30 + years w/ very few failures.

My opinion is the 12 bolt is the best all round rear end [ PERIOD !!! ] :clap

If anybody wants more info e-mail me & i will help.

If i can take some pictures & figure out how to post them i will.


Denny

[SS425HP]

Denny, send me the pictures and I will post them. I'll use them, too. Moser said they couldn't weld the upper arms to the cast center section. The left side looks like it would have to be welded to the center section, like it is on the stock rear end. They seemed to think it would not weld to the center section. At least that's the opinion I got from them. Talked to Rob Moser and Mike. Both were against a 12 bolt with our upper arms. They were pushing the 9" pretty hard.

Fred

Allen uses a 12 bolt, too. And his has the 2 upper arms. I have pictures of them. I thought I had pictures of yours, too, but can't locate them!!!!! Can't find my intake bolts, and JUST found my camera tonight. Have looked for it for 2 days.
I'm going to hide my own Easter Eggs this year. Should take me all day to find them. If I do find them!!!!!!!!!!!!!!!!!

[jim_ss409]

Last fall when I got back from the convention I got a new 12 bolt from DTS. http://www.drivetrainspecialists.com/index2.html They have them either with or without the extra (right side) brackets. I got it with the bracket. I got it through them because I could get it quickly and pick it up myself to save shipping. The plan was to install it quickly so that I could get some use out of the car before winter came. Now spring's almost here and I still haven't even started installing it. :cuss I ordered it with an aluminum rear cover that has the bearing cap suports but I'm woried that it might stick out too far and hit the panhard bar. :scratch

[fatride]

Fred I have two or three sets of intake bolts just tell me when to send, Or you can buy stainless steel from a Co. on Ebay. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=7933124448&category=33620

[JimKwiatkowski]

Jim,are you going to have that 12 bolt in by June for Norwalk?

[jim_ss409]

Jim,are you going to have that 12 bolt in by June for Norwalk?
Yes, It's got 4.10 gears so it'll be good for drag racing. I also got a new 5 speed overdrive tranny that I hope to have in by then too.

[JimKwiatkowski]

I think you should be able to get into 12's with that setup :D

[fatride]

I think you should be able to get into 12's with that setup :D


Don't worry Jim, I'll be right behind you pushing you through the 1/4 :brow

[JimKwiatkowski]

Ray,since the subject is rearends,did you install ladder bars for your wheel hop?

Sunday is the first day of Spring and it's snowing :( :mad: :cuss :bang

[fatride]

No Jim, the one's I was looking at were not adjustable. I will be adding air bags this spring. I have poly bushings and have boxed the upper and lower trailing arms. I also have added a second upper.

[Lyndon]

I have been reading all I can find on these 10 bolt 8.2 inch rear ends and I'm a bit worried. I have a 1964 canadian pontiac convertible that I would like to put a 383 stroker with 700r4 into. I know that I need to get the aftermarket posi carrier for it as mine is open (3.36 gears) but is there any hope at all of this rear end holding up with street use and approx. 400 hp?