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Need help selecting front coil springs

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Old May 10, 2014 | 05:16 PM
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Default Need help selecting front coil springs

When I got my 79 the suspension was sagging pretty good. I went with stock-height front springs because I was worried the 255/60/15 tires wouldn't fit if I lowered it at all. However, I didn't account for the fact that I'd be taking some weight off the front with aluminum heads etc. On the rear I have a composite fiberglass 340lb. What would be good lowering front springs to pair with that rear spring? also, I have the HD Bilstein on the front and the sports on the rear. Here is a pic of the car so you can see how the front sits.

(That's my son before prom)
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Old May 10, 2014 | 06:00 PM
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Get the VBP 550# springs. You will love them.
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Old May 10, 2014 | 08:10 PM
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Whoa! Your car sits as high in the front as my roadster.....which is high! You could lower it 2" and still have plenty of air between the tire and fender lip.
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Old May 10, 2014 | 08:24 PM
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Originally Posted by doorgunner
Whoa! Your car sits as high in the front as my roadster.....which is high! You could lower it 2" and still have plenty of air between the tire and fender lip.
I know. And it appears most of the springs just lower it 1". What I don't know is how much it will eventually settle on its own.
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Old May 10, 2014 | 08:31 PM
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Originally Posted by IA_Stingray
I know. And it appears most of the springs just lower it 1". What I don't know is how much it will eventually settle on its own.
My '68 project originally had the 327 c.i. with (I think) 330 lb. coil springs........for comparison with your aluminum heads/etc.

It looks like I may have to cut 1 & 1/2 "wraps" off of each coil spring...or find a pair of 8" high 330 lb. springs
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Old May 10, 2014 | 08:38 PM
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Originally Posted by The Punisher
Get the VBP 550# springs. You will love them.
I have VBP 550# springs on my 68 and 70. The 70 has not been on the road. From the AIM, the shipping weight of the 68 was 3050 lbs! I've put a lot of aluminum in the car and deleted at lot of weight. I think it weighs about 2850 lbs. The 550# springs are way to stiff for this light weight. The car drives like a go-kart. My opinion is that for a street car, that weights up around 3300 to 3500 pounds, front springs with less lb/inch will still be better than 550 lb/inch.

I've got VBP 550# springs on the 70 and I'll stick with them, mainly because I don''t like to change springs, the 70 has a BB so the bigger springs will work out better.
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Old May 10, 2014 | 09:43 PM
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550# springs before and after pics









Dropped 2"
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Old May 10, 2014 | 09:59 PM
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Hmmm.... That does look a lot better...
Are there slightly softer springs that would have the same impact on the tire/fender gap?

Last edited by IA_Stingray; May 11, 2014 at 12:12 AM.
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Old May 10, 2014 | 10:43 PM
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Moog makes two slightly different 474 lb/in springs for the C3. That spring should give you a wheel rate of about 180 to 190 lb/in.
The 5758 is slightly shorter. Better for smallblocks with no AC. Or if you want to lower the front a bit.
The 5762 is just a bit longer. For big block cars and with AC.
Either of these springs would need a stiffer than stock shock to control them. Like a Bilstein Sport, for example.

Last edited by gcusmano74; May 10, 2014 at 10:53 PM.
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Old May 10, 2014 | 11:16 PM
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Originally Posted by The Punisher
550# springs before and after pics






Dropped 2"
It looks perfect. Your before-pic looks like my car right now.....I removed the old shocks and at 170 lbs., I can get the front suspension to flex easily.

Last edited by doorgunner; May 10, 2014 at 11:21 PM.
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Old May 11, 2014 | 02:24 AM
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Originally Posted by IA_Stingray
Hmmm.... That does look a lot better...
Are there slightly softer springs that would have the same impact on the tire/fender gap?
Because you have a taller tire it should ride nice. The spring is primarily ride height. Your shocks do the dampening.
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