lower control arm u-bolt question
 

Have any of y'all used the dorman 13503 u-bolts for your lower control arms?
I was reading in another section of the forum that you can drill them out to accommodate the thicker u-bolts. Am I reading this wrong?

Re: lower control arm u-bolt question
 

I don't see where it would do any harm. As long as the distance of the U bolt is the same fit around the shaft.

Re: lower control arm u-bolt question
 

Yes they will fit. I used Napa pn 650-4065, same thing. 73+ lower a arm shaft u bolts. Get a 9/16 drill bit and hold on tight to your drill.

Re: lower control arm u-bolt question
 

Any auto parts store , Dorman 13503 about $9.95 a set so for $20.00 you can upgrade just for the increase in safety , Let alone what can happen to your baby if the old stock ones fail .:chevy:

Do a little searching there are a few threads on changing them out safely .

Re: lower control arm u-bolt question
 

Y'all have any idea where I might find the bump stops for the UCA and LCA? I have looked at like Napa and I was trying not to have to order them. My parts finally arrived and this was the one thing I forgot to order :waah:

Re: lower control arm u-bolt question
 

Check this out. http://www.67-72chevytrucks.com/vboa...d.php?t=697370

It's how I did mine, and also upgraded to grade 8, 9/16" u-bolts.

On this page from my build thread you can see how they will be installed.

http://www.67-72chevytrucks.com/vboa...=620369&page=6

Gary

Re: lower control arm u-bolt question
 

I just did mine last week. Buy a new 9/16 drill bit and be careful. I torqued them to 75 pounds.

Re: lower control arm u-bolt question
 

Glad I ran across this, looks like something worthwhile to do on my 72. I had planned to reuse my stockers as they are in good shape, but seeing others have problems makes me want to upgrade.

Re: lower control arm u-bolt question
 

I also got lucky and the 9/16" u-bolts fit in my cross member without having to drill out the holes.

Gary

Re: lower control arm u-bolt question
 

Super happy to run across this thread, since I am currently getting my front end all put back together.

I grabbed a spare 9/16" grade 8 bolt I have and it slid right through my stock holes. So this upgrade is a no brainer.

Shipping to Hawaii will delay the process a tad, but happy to wait in safety's name.

Re: lower control arm u-bolt question
 

Does anyone know if this applies to 1968 trucks also?? I'm fixing to tear into my front end and replace the lower shafts, when i go disc brakes....

Re: lower control arm u-bolt question
 

I did it on my 67. I had to drill the holes out.

Re: lower control arm u-bolt question
 

Drill them and don't give it a second thought. I don't think the 1/2 bolts are even available anymore