Anti-Rotation Bracket Ideas - 57-64 Olds

[Countn Carbs]

Roo - I'm curious what you (or others) recommend for an anti-rotation bracket set up on a 57-64 olds rearend. What you've done, anything available off the shelf...etc...

[dreracecar]

Back when the magnezium cases were around, they had a flange at the front that was used , but with the stock case, you can weld 2 tabs to the bottom of the RE housing and come up off the bottom of the chassis.

[Countn Carbs]

I gotcha...so maybe like a couple of 3/16" thick tabs for a 7/16 grade 8 bolt - or something along those lines?

[Paul New]

Here you go buy this set up it has a bolt pattern on the front to add the anti rotation plate

https://portland.craigslist.org/clk/pts/5968963019.html

[dreracecar]

That early Olds housing will not take abuse of current tires and sticky tracks

[rooman]

I gotcha...so maybe like a couple of 3/16" thick tabs for a 7/16 grade 8 bolt - or something along those lines?

You are on the right track mate! The NT/F spec calls for a pair of .875 x .058 tubes that can be either welded or bolted to the frame with at least two Grade 5 or better 3/8 bolts. The tubes can come together and be bolted to the rear axle housing with a single Grade 5 or better 3/8 bolt in double shear or with a pair of the same in single shear.

Roo

[rooman]

Here you go buy this set up it has a bolt pattern on the front to add the anti rotation plate

https://portland.craigslist.org/clk/pts/5968963019.html

Paul,
        that rear end is the early small Olds so it would not have fitted anyway.

Roo
ps The seller is Earl Floyd who has quite a history in the sport, check the 4th paragraph:
http://cacklefest.com/Northwind.shtml
We had an interesting chat just now when I purchased the parts--thanks for the lead.

Roo

[Paul New]

Here you go buy this set up it has a bolt pattern on the front to add the anti rotation plate

https://portland.craigslist.org/clk/pts/5968963019.html

Paul,
        that rear end is the early small Olds so it would not have fitted anyway.

Roo
ps The seller is Earl Floyd who has quite a history in the sport, check the 4th paragraph:
http://cacklefest.com/Northwind.shtml
We had an interesting chat just now when I purchased the parts--thanks for the lead.

Roo

I knew it was in Earls collection he has some cool old stuff! I do not know any thing about the early Olds stuff but knew someone needs it!

[Countn Carbs]

I have the rearend tack welded in the car now at the preferred ride height but i  only have about a half inch from the bottom of the rearend housing to the bottom of the chassis.  I hate to move the rearend up higher in the car if I don't have to.
Any ideas with only having a small area under the car to deal with? Or just make the brackets and if it hangs down no big deal???  As long as it's not below the scrub line?

[dreracecar]

What are you doing?

[dwrfab]

I hope you are going to weld a tube in front of the mount plates. They need to be welded completely on one side and skip welded 1" skip welds on the other.

[crider]

Kinda looks like you have the whole drivetrain mounted too low in the chassis?

[Countn Carbs]

I hope you are going to weld a tube in front of the mount plates. They need to be welded completely on one side and skip welded 1" skip welds on the other.

Yeah sorry - I should have clarified this and thank you for the advice.  I still have to fit/cope them but the plan is for 1.500 O.D vertical tubes (.125" wall) with the mounting plates then welded like you described.  I just tacked this in to see what I was going to do for anti-rotation set up.

[rooman]

Kinda looks like you have the whole drivetrain mounted too low in the chassis?

I agree. As it sits now it appears that you will have something like 9" or 10" of ground clearance with any sort of reasonable tire diameter.

Roo

[janjon]

What will the kidney bars look like?