upper A Frame Mounting - Camaro Forums - Chevy Camaro Enthusiast Forum

upper A Frame Mounting

Old 07-10-2018, 08:39 PM
In the Staging Lanes
Thread Starter
Join Date: Jun 2018
Posts: 42
Default upper A Frame Mounting

Hi, getting ready to start assembling the Subframe for my 67 Camaro. Where the upper A Frame mounts I have 2 sets of holes.`' Someplace I found that lowering the mounting points was beneficial. In the past looks like the upper holes were the only ones used. So the question is which ones do I want to use and why.
3 See picture. In the process of removing a Tilt front end and replacing with original sheet metal . Turning into a bigger project than thought it would be.
Attached Thumbnails upper A Frame Mounting-img_0020%5B1%5D.jpg  
Old 07-10-2018, 10:51 PM
Camaro 69's Avatar
Senior Moderator
January 2010 ROTM Winner
Join Date: Oct 2007
Location: The 'Burbs of Chicago
Posts: 17,989

From the factory, our cars only had the upper holes. A previous owner drilled those lower holes on yours, it's what's called the "Guldstrand Mod". You can read about the handling benefits here: How Four Holes and a Bit of Time Can Dramatically Improve Your Car?s Performance in the Turns
Old 07-10-2018, 10:58 PM
1st Gear Member
Join Date: Feb 2018
Posts: 201

Does the lower arms have 2 sets of holes?
Old 07-10-2018, 11:12 PM
In the Staging Lanes
Thread Starter
Join Date: Jun 2018
Posts: 42

Thanks, looks like they set the camber to zero after modification, but they don't say what the caster is.
Looking at my holes not sure the lower ones were ever used. Can see the bolt knurl marks on upper holes, but no marks in lower holes unless used a non knurled bolt. Guess will try the lower holes and see what happens. The daughter may want to try an autocross or two.
Old 07-11-2018, 01:18 AM
In the Staging Lanes
Thread Starter
Join Date: Jun 2018
Posts: 42

No, only one set of holes for lower control arm, 2 sets as pictured for upper .
Old 08-01-2018, 07:14 AM
Smee78's Avatar
1st Gear Member
Join Date: Dec 2009
Location: Summerville,SC
Posts: 188

Interesting read, I have not heard of this method before, thanks for the article 69.
Related Topics
Thread Starter
Last Post
93-02 General
06-15-2010 01:13 PM
67-69 General
08-05-2007 01:01 PM
70-81 General
03-07-2007 07:33 PM
General Tech
09-26-2006 04:39 PM
70-81 General
06-29-2005 12:42 AM

Thread Tools
Search this Thread
Quick Reply: upper A Frame Mounting

Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.