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01-27-2017, 09:08 PM
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#1 |
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Registered User
 
Join Date: Oct 2016
Location: austin, tx
Posts: 115
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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?
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. . . . 1969 GMC 1500 - looooooooong bed If it's not broke, then I haven't touched it yet. CMG96 = 69GMC |
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01-27-2017, 11:23 PM
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#2 |
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Registered User
Join Date: May 2016
Location: Sackets harbor ny
Posts: 282
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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.
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01-27-2017, 11:44 PM
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#3 |
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Registered User
Join Date: Apr 2011
Location: Mustang, Oklahoma
Posts: 2,807
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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.
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Dan <---(my name) 67 SWB C10 project "GEORGIA"-59 Brookwood 2dr wag...Next project-03 Tahoe 4x4 5.3 family ride-07 Hondur Accord, commuter car |
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01-28-2017, 07:34 AM
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#4 |
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Senior Member
Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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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 .
 Do a little searching there are a few threads on changing them out safely . |
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02-03-2017, 12:49 PM
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#5 |
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Registered User
Join Date: Oct 2016
Location: austin, tx
Posts: 115
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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
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. . . . 1969 GMC 1500 - looooooooong bed If it's not broke, then I haven't touched it yet. CMG96 = 69GMC |
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02-03-2017, 12:52 PM
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#6 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,921
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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
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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02-03-2017, 08:35 PM
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#7 |
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Registered User
Join Date: Feb 2012
Location: Somers Point NJ
Posts: 95
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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.
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02-03-2017, 10:35 PM
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#8 |
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Registered User
Join Date: Nov 2012
Location: 9
Posts: 862
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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.
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02-04-2017, 02:11 PM
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#9 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,921
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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
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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02-28-2018, 05:35 AM
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#10 |
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Registered User
Join Date: Oct 2013
Location: Anaheim, CA
Posts: 526
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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.
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-JASON My grandpa, Gramps, won a 1970 C20 in 1969 for $1. I'm on a mission to restore it before he passes. My 1970 C20 Build Thread |
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02-28-2018, 10:48 AM
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#11 |
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Senior Member
Join Date: Dec 2003
Location: Pampa, Texas
Posts: 1,554
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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....
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https://www.ebay.com/itm/295742064443 |
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02-28-2018, 04:49 PM
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#12 |
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Post Whore
Join Date: Feb 2016
Location: Portland Oregon
Posts: 10,820
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Re: lower control arm u-bolt question
I did it on my 67. I had to drill the holes out.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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02-28-2018, 07:14 PM
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#13 |
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Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,393
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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
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