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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: 2,806
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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: 8,971
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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: 8,971
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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: 1,553
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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/29620574751...mis&media=COPY |
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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: 11,350
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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),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 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: 8,630
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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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