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question on rear sway bar and comp suspension.
#1
From my Marti report my 73 vert came with competition suspension. I understand that because it isn't a Qcode it doesn't have the staggered shocks but I don't see anything where a rear swaybar might hook up. The plates are gone. There are some holes in the rear frame rails but nothing that looks like a welded in nut. Am I missing something? I see new rear swaybars for sale that are specified for cars that came with the comp package but I don't see how my car might be different other then stuff that would have been bolt-on anyways. I want to add a swaybar but not sure how to continue. Any input would be appreciated.
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#2
sdstang
You should be able to install the rear sway bar with no issues. You will however need to purchase the mounting plates (2) for the sway bar that are installed above the shock plates. I believe that the holes for the bushings should already be predrilled on the frame rail. I circled in red where to look for them. Don at OMS or Mike at MotorCity Mustang should be able to hook you up with the parts you need.
-jbojo


Attached Files Thumbnail(s)
       

-john
(jbojo)
351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,
C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

Some Mod pictures can be seen at:

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#3
if your 73 did come with competition suspension and if the chassis hasn't been fixed around the tops of the rear shocks then there would be an extra cross member allowing for mounting the shocks with one at the front and one at the rear.

there would also be nuts welded into the rear frame rails just behind the rear axle to allow for the factory competition bar to fit.

[Image: swaybarrearbracket1.jpg]
[Image: rearstabilerbracket65.jpg]
[Image: swayBarInstallationDiagram.jpg]

staggered shock plates at leafs
[Image: shockmountright.jpg]
[Image: shockbracketleft.jpg]

Staggered shock cross member on chassis. the drivers side shock is mounted behind the axle and just in front of the fuel tank strap holder is an extra cross member welded to the chassis. you can see it in line with the lower shock stagger plate.
[Image: undercarriage7.jpg]

Now it is possible your marti report is wrong and the car was never built with competition rear suspension. Or that part of the car rotted off over time and during a shock repair they flipped the shocks into the standard position. The tops of the shock mounts are notorious for rusting away or cracking off requiring a big weld job when it came time to replace the original shocks and fabricate mounts.

However if you look at that drivers side cross member and there is no evidence of it ever being on the car then your car was never built with a competition rear suspension and it explains the missing markers you are seeing.

Fear not.

Addco and a few others make retrofit kits that allow you install arear sway bar system on a car that never had it.
https://www.mustangsunlimited.com/itemdy...?T1=996+01

i use it on my car
[Image: DSCN2500_zps85cb1bfb.jpg]

[Image: DSCN2499_zps1a53b1a6.jpg]

requires drilling 4 holes in the frame rails a little bit of a pain in due to the angle your drilling at and the rear axle is in the way. i used a dremel and a hand drill with a cutter bit and a long drill to make the mounts.
once drilled out the entire thing goes together in minutes tighten up the bolts and your ready to rock and roll MAKES A BIG DIFFERENCE in the way they car handles/feels and brakes.


photobucket has limited my account so the photos may not be showing.
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#4
My vert originally had the competition suspension along with the 15inch Magnum 500 but it has no sign of a rear sway bar whatsoever. No holes, no brackets, nothing.
So it seems to be quite common that they did not have a sway bar.

[Image: 1z21rv4.png]

Mike

"If I were you...... I´d rather be me."  Tongue

Check out my video:
http://www.7173mustangs.com/thread-my-mustang-in-action

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#5
Comp suspension option included HD shocks - heavier front sway bar 7/8 VS 3/4 and a rear sway bar 1/2 -
I have seen comp susp option on all 3 body styles and on cars with 302's and 351 2V's
Staggard shocks were on all 4 V cars [ except Jim's 71 in WA - Tongue ]
I think staggard shocks are to deal with wheel hop.

I have seen many cars with the rear sway bar missing
Biggest reason was traction bars were installed and sway bar tossed

Do you have a 7/8 front bar?
Don
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#6
Looks like my front is a 3/4" sway bar. Ive attached pic of the holes in the frame. One side has undercoating and the holes are somewhat covered(maybe thats a sign). The other you can see clearly but no welded in nuts.


Attached Files Thumbnail(s)
   
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#7
Check for the extra cross member on the drivers side for the staggered setup.

the sway bar was designed to clear staggered shocks, so the design is different from a aftermarket add on rear sway.

looking at your frame rails don't think you had competition suspension ever on that 73.

again a marti report can be incorrect because ford may of wrote the wrong information or the competition suspension might of been cancelled on that car.
like a dealer ordered the car with a competition rear but ford couldn't fill the order and the dealer accepted it without the competition rear to make a sale.

as don said it could of been stripped off but you would see evidence of the mounts or discoloration of the undercoating.
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#8
72HCODE;136011 Wrote:Check for the extra cross member on the drivers side for the staggered setup.

the sway bar was designed to clear staggered shocks, so the design is different from a aftermarket add on rear sway.

looking at your frame rails don't think you had competition suspension ever on that 73.

again a marti report can be incorrect because ford may of wrote the wrong information or the competition suspension might of been cancelled on that car.
like a dealer ordered the car with a competition rear but ford couldn't fill the order and the dealer accepted it without the competition rear to make a sale.

as don said it could of been stripped off but you would see evidence of the mounts or discoloration of the undercoating.

72HCODE,
I don't have the staggard shocks so does this mean I can go with an OEM or aftermarket rear swaybar. I thought I read some thread that there were not very many good offerings for rear swaybars?
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#9
you are correct there is basically one aftermarket design and thickness for the rear bar on our cars if you do not have a competition rear suspension.

you could assemble all the OEM parts required to install the OEM sway system for competition suspension and they offer a thicker 1" rear bar for competition rear suspension for the aftermarket.
however you would need to modify your rear rails to accept the OEM hardware which if you are a good welder can be done you can weld nuts inside the rails if you wanted you just need to cut open the rails predrill the new mounting holes install the nuts and weld everything in place. you could also get a competition staggered shock cross member from a donor and weld it to the floor pan in the chassis.

it is all possible but truly converting to competition rear OEM spec will be more expensive and time consuming. The addco sway bar just requires 4 holes drilled in the frame rails you use the original holes like in your photo as a guideline of where to drill. basically the smaller hole at the back that is offset from the 3 larger front ones becomes a drill guide for the new addco sway bar mount.

the shocks position won't matter with the aftermarket rear sway bar for the OEM it shouldn't interfere either , basically like don stated the offset shocks are for wheel hop.

easiest and cheapest is installing the addco rear sway bar. again you drill 4 holes and everything just bolts right up. basically you assemble the sway and mounts on the leaf springs first, line everything up so the mounts are straight and it dictates where the rubber grommets sit on the frame rails, then you put the bracket over it and mark the drill holes on the frame rails, keep them centered, and you use that little rear hole as a guide you can measure off so you get the left and right frame mounts square. then you pop 4 holes, install the U bolt through the frame and snug everything up and you are done.

just check clearance on the exhaust and brake lines.

again the stagger to the shocks doesn't matter unless you actually have staggered shocks then only the oem would fit. no staggered shocks means either the oem or aftermarket would clear the area but the mounting systems are different for the bars themselves. so either you collect all the oem parts needed to mount the original competition bar which allows for an upgrade to an even thicker bar. or you go Addco rear where there is only one option for the bar.

i think the addco works fine and it really improved handling for normal street driving.
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#10
72HCODE;136024 Wrote:you are correct there is basically one aftermarket design and thickness for the rear bar on our cars if you do not have a competition rear suspension.

you could assemble all the OEM parts required to install the OEM sway system for competition suspension and they offer a thicker 1" rear bar for competition rear suspension for the aftermarket.
however you would need to modify your rear rails to accept the OEM hardware which if you are a good welder can be done you can weld nuts inside the rails if you wanted you just need to cut open the rails predrill the new mounting holes install the nuts and weld everything in place. you could also get a competition staggered shock cross member from a donor and weld it to the floor pan in the chassis.

it is all possible but truly converting to competition rear OEM spec will be more expensive and time consuming. The addco sway bar just requires 4 holes drilled in the frame rails you use the original holes like in your photo as a guideline of where to drill. basically the smaller hole at the back that is offset from the 3 larger front ones becomes a drill guide for the new addco sway bar mount.

the shocks position won't matter with the aftermarket rear sway bar for the OEM it shouldn't interfere either , basically like don stated the offset shocks are for wheel hop.

easiest and cheapest is installing the addco rear sway bar. again you drill 4 holes and everything just bolts right up. basically you assemble the sway and mounts on the leaf springs first, line everything up so the mounts are straight and it dictates where the rubber grommets sit on the frame rails, then you put the bracket over it and mark the drill holes on the frame rails, keep them centered, and you use that little rear hole as a guide you can measure off so you get the left and right frame mounts square. then you pop 4 holes, install the U bolt through the frame and snug everything up and you are done.

just check clearance on the exhaust and brake lines.

again the stagger to the shocks doesn't matter unless you actually have staggered shocks then only the oem would fit. no staggered shocks means either the oem or aftermarket would clear the area but the mounting systems are different for the bars themselves. so either you collect all the oem parts needed to mount the original competition bar which allows for an upgrade to an even thicker bar. or you go Addco rear where there is only one option for the bar.

i think the addco works fine and it really improved handling for normal street driving.

Thanks so much! That was very informative. I plan to go with a larger front bar to.
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