F40/41 rear swaybar holes in trailing arms - Chevelle Tech
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post #1 of 17 (permalink) Old Apr 28th, 18, 4:14 AM Thread Starter
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F40/41 rear swaybar holes in trailing arms

I'm looking to fit a Hotchkis rear swaybar to my '67 El Camino, If someone can help I'm chasing the dimensions of the trailing arms and where I need to be drilling holes in them.

Hotchkis instructions say to "unbolt the old one, then install our's and your done" That doesn't help if there has never been one fitted, and no holes

I did see a PDF from an Aim today with the specs but my eyes struggled with the writing. Info on the spacers would be great also as I'll be making my own.

Any help appreciated
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post #2 of 17 (permalink) Old Apr 28th, 18, 7:18 AM
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Re: F40/41 rear swaybar holes in trailing arms

I don't know if it helps, but someone put a bar on my 1967 El Camino. We got it over 20 years ago, so I don't know the details.



I can take measurements if needed.

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post #3 of 17 (permalink) Old Apr 28th, 18, 8:48 AM
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Re: F40/41 rear swaybar holes in trailing arms

Can you install it on the rear axle and "spot" the proper hole location in the arms that way? Think thats how I did it.

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post #4 of 17 (permalink) Old Apr 28th, 18, 9:05 AM
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Re: F40/41 rear swaybar holes in trailing arms

You also should be using shims between the ends of the sway bar and lower control arms if there is to much clearance so your not pulling in on the control arms.
https://www.npdlink.com/store/produc...-117281-8.html

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post #5 of 17 (permalink) Old Apr 28th, 18, 1:04 PM
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Re: F40/41 rear swaybar holes in trailing arms

I wouldn't run a sway bar that bolts to a LCA that isn't boxed.

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post #6 of 17 (permalink) Old Apr 28th, 18, 2:09 PM
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Re: F40/41 rear swaybar holes in trailing arms

Quote:
Originally Posted by -SS454- View Post
I wouldn't run a sway bar that bolts to a LCA that isn't boxed.
This is the way I lean as well. Sure the spacers will keep the bar from crushing, but by boxing you help eliminate the torsional forces that will twist the control arms. The boxing inserts are dirt cheap and your best bet next to something like much stronger control arms from companies like Hotchkiss. Plus you get to bust out the welder and have some fun. If you don't have a welder, this gives you a good excuse to buy one. WIN/WIN situation.
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post #7 of 17 (permalink) Old Apr 28th, 18, 3:23 PM
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Re: F40/41 rear swaybar holes in trailing arms

https://www.lever-family-racing.com/...m-a-body-64-72

scroll down to - Rear Lowers

I would also install/tack weld in the sleeves as shown above.
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post #8 of 17 (permalink) Old Apr 28th, 18, 4:56 PM
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Re: F40/41 rear swaybar holes in trailing arms

No, not sleeves. boxing plates

https://www.summitracing.com/parts/o...SJYaAh0Z8P8HAQ
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post #9 of 17 (permalink) Old Apr 28th, 18, 6:38 PM Thread Starter
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Re: F40/41 rear swaybar holes in trailing arms

Quote:
Originally Posted by Mike View Post
https://www.lever-family-racing.com/...m-a-body-64-72

scroll down to - Rear Lowers

I would also install/tack weld in the sleeves as shown above.
Thanks
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post #10 of 17 (permalink) Old Apr 28th, 18, 7:54 PM
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Re: F40/41 rear swaybar holes in trailing arms

sleeves won't do it. they'll keep the arm from collapsing from torquing down the bolt but don't help at all with stiffening the arm. Glen Lever does it right. better than factory and includes the minor mod needed for 12 bolt rears.

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post #11 of 17 (permalink) Old Apr 28th, 18, 8:10 PM
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Re: F40/41 rear swaybar holes in trailing arms

All of the resto parts places carry the boxing plate's and those plates will accurately help you to locate the sway bar holes.Or you can buy a pair of lower arms that are already boxed.I added a set of boxing plates to a set of lower control arms with an arc welder and they came out mint.If you can't find measurements anywhere I'll go and measure mine for you.
There are some small holes on the LCA's that don't meet up with anything and you shouldn't use them to locate the sway bar holes.
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post #12 of 17 (permalink) Old Apr 29th, 18, 10:03 AM
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Re: F40/41 rear swaybar holes in trailing arms

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Originally Posted by Tom Mobley View Post
Yeah . that would be better/easier than fabbing the ones shown on the Lever site.
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post #13 of 17 (permalink) Old Apr 29th, 18, 5:02 PM
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Re: F40/41 rear swaybar holes in trailing arms

here's a better URL without all the google marketing crap

https://www.summitracing.com/parts/opg-rcai001

Less than $20.
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post #14 of 17 (permalink) Old Apr 29th, 18, 5:24 PM
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Re: F40/41 rear swaybar holes in trailing arms

Quote:
Originally Posted by Tom Mobley View Post
sleeves won't do it. they'll keep the arm from collapsing from torquing down the bolt but don't help at all with stiffening the arm. Glen Lever does it right. better than factory and includes the minor mod needed for 12 bolt rears.
What's the mod for 12 bolt rear ends. Just curious because I've never owned a 10 bolt and wasn't aware of the mod to go from 10 to 12 trailing arms.
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post #15 of 17 (permalink) Old Apr 29th, 18, 6:00 PM
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Re: F40/41 rear swaybar holes in trailing arms

The driver's side upper control arm is ground off and beefed up to keep it from hitting on the housing.
https://www.lever-family-racing.com/...2_Bolt_001.jpg

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