Chassis Stiffening

motorheadmike

Geezer
Nov 18, 2009
7,498
113
Ottawa, Ontario Canada
Here's what I did:




There is a bunch more in both the wagon and Monte builds.

 

Kiko

Master Mechanic
Apr 14, 2009
287
63
Ottawa, Canada
GNS Performance rear frame rail brace & UMI upper shock mount brace

Even though I don't have the GNS brace (I made my own) -- that and the UMI brace do wonders. The front Pontiac brace is also a must.
 
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mc1984ss

Greasemonkey
May 18, 2020
188
43
That summit body mount kit is polyurethane. Not sure if it's true but supposedly some of the black polyurethane bushings contain graphite to help prevent squeaks.

So general opinion is the umi brace is worth it?
 
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Kiko

Master Mechanic
Apr 14, 2009
287
63
Ottawa, Canada
Pretty close to what I did! Bought some steel stock; drilled the holes; primed and painted -- voila! Nothing complicated about that brace -- it's just there to tie the rear forks together, nothing more. Just makes the rear frame stiffer.
 
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Steve C

Not-quite-so-new-guy
Oct 12, 2017
15
3

1978-1988 GM G-Body Control Arm Reinforcements/Frame Braces​

This and control arm work will stop wheel hop.

1978-1988 GM G-body Front Reinforcement Brace, Bolt-In​

1978-1988 GM G-Body Rear Shock Tower Brace, Bolt-In​

These will help the frame from twisting.

If you weld there are many options. I started with boxing the rear lower control arm mount and completing the welds on the frame. Its amazing that the welds are not equal from side to side or car to car.
 
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motorheadmike

Geezer
Nov 18, 2009
7,498
113
Ottawa, Ontario Canada
When I was jacking up the front of the Monte yesterday the rear tire lifted too. Pretty cool to see considering I haven't even made the SFCs yet.
 
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