Lower ball joint bolt 9 1/6 ×?

[ratvon]

I'm doing a disc brake conversion on a 68 barracuda what hardware do I need to bolt on the lower ball joints. Diameter thread and length. Washer and stover nut? Found out the drum style bolts are too small

 

[AJ/FormS]

From the factory, those are Special long-shank bolts.

 

[SLOPAR72]

I just went through this..... The Length that I cam up with was a touch over 2.625". The thread pitch is 9/16-18. I used a standard height Jam Nut and then milled them down to a height which cleared the Shields, Calipers, and still locked the Bolt down.

I never found OEM Hardware and got everything from Fastenal and just cut/threaded/milled the Fasteners. Maybe someone will chime in as to where you can get the pieces as it took a while to make it all fit. The end result is everything worked out great.

Good luck,
JW

 

[ratvon]

Thanks

 

[Sedanman]

5/8size, 18 threads per inch and 2 3/4 long (give or take) for 73-up disc spindles and can be found at most big box home supply stores. I bought mine from Menards

 

[ratvon]

I just went through this..... The Length that I cam up with was a touch over 2.625". The thread pitch is 9/16-18. I used a standard height Jam Nut and then milled them down to a height which cleared the Shields, Calipers, and still locked the Bolt down.

I never found OEM Hardware and got everything from Fastenal and just cut/threaded/milled the Fasteners. Maybe someone will chime in as to where you can get the pieces as it took a while to make it all fit. The end result is everything worked out great.

Good luck,
JW

 

[ratvon]

2 and 5/8 from the bottom of the head correct? Or are you talking overall length?

 

[Sedanman]

5/8 is the bolt size/diameter and the 2 3/4 is the length from the bottom of the bolt head down

 

[ratvon]

5/8 is the bolt size/diameter and the 2 3/4 is the length from the bottom of the bolt head down

5/8 is the bolt size/diameter and the 2 3/4 is the length from the bottom of the bolt head down

Ya I was replying to the other the guy but 5/8 ×2 3/4 worked for you and wasn't too long or too big ...I'm pretty sure that it is a 9/16- 18 ×2.625 that was used

 

[Sedanman]

5/8 is a snug fit and I think the 9/16 will be too loose.

 

[ratvon]

5/8 is a snug fit and I think the 9/16 will be too loose.

How about the length have you tried that?

 

[Sedanman]

I brought my ball joint and spindle with me to check and I think I used a 3" because they didn't have 2 3/4. I did shave the head down for clearance of the rotor

 

[ratvon]

I brought my ball joint and spindle with me to check and I think I used a 3" because they didn't have 2 3/4. I did shave the head down for clearance of the rotor

Oh so you brought your bolts out through the ball joint and the heads were inside again up against the rotor

 

[ratvon]

Oh so you brought your bolts out through the ball joint and the heads were inside again up against the rotor

On my old drum brakes the bolts come from the outside in

 

[SLOPAR72]

I have a wheel off and will measure what I did for you. There is a Dorman number that will suffice for the bolts I believe....

JW

 

[Sedanman]

Oh so you brought your bolts out through the ball joint and the heads were inside again up against the rotor

They push in and the nut is on the back side.

 

[Sedanman]

I just noticed that you didn't mention which disc set you are swapping to. Which one are you using?. I think the KH uses the 9/16 bolts and the later large disc's use the 5/8

 

[ratvon]

I just noticed that you didn't mention which disc set you are swapping to. Which one are you using?. I think the KH uses the 9/16 bolts and the later large disc's use the 5/8

They are 5/8 holes

 

[Sedanman]

so the later disc brakes

 

[ratvon]

so the later disc brakes

Yep

 

[ratvon]

Yep

Didn't know there were two sizes

 

[Sedanman]

The KH 4 piston set up uses smaller bolts 9/16 I think. Do you have a Menards,Fastnal or HomeDepot near by? Get the 5/8x16x 2 3/4 or 3" and cut off the extra