[jimib]

I have replaced all body mounts. Over the past 20 years, I may have driven this car not even 1000 miles. The springs are 20 years old, the shocks about 15 years. I assume springs and shock should be replaced first.

Is it OK to use spacers with the springs to add height or does a taller spring exist? Could I use air shocks in addition to springs with spacers? How do these parts affect stability of the ride?

Also, I'll soon be upgrading to a complete rear (possibly Moser) with disk brakes and upgrading to 15 inch tires (maybe taller) and eliminate the 14 inch.

[400 Lemans]

https://mcbayperformance.com/passeng...s-trucks-suvs/ These work well and very fast shipping to. Stay away from air shocks. They are to hard on the shock mounts.

[indymanjoe]

Is the motor in? seriously though my opinion is (1) No air shocks,they will leave ya stranded.( 2) Spacers are a no go which leads to( 3) springs carry the weight and shocks smooth it out. Street section stu.

[leeklm]

Yeah, the front end seems high, but of course the rear is low, so might be an optical illusion. Often times we end up making these cars lighter with aluminum heads, intakes, removing AC, etc. End result is now the front springs are too stiff! That happened on my 73 GTO and ended up installing moog springs listed for a 6cyl car to level it back out

To get the rear up, I have always been a fan of Air Lift airbags. Nice they are fully adjustable so if you are loading up the trunk with coolers, etc, you can increase the lift a little more.

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[1968GTO421]

Originally Posted by leeklm

Yeah, the front end seems high, but of course the rear is low, so might be an optical illusion. Often times we end up making these cars lighter with aluminum heads, intakes, removing AC, etc. End result is now the front springs are too stiff! That happened on my 73 GTO and ended up installing moog springs listed for a 6cyl car to level it back out

To get the rear up, I have always been a fan of Air Lift airbags. Nice they are fully adjustable so if you are loading up the trunk with coolers, etc, you can increase the lift a little more.

Sent from my SM-G965U using Tapatalk

Here's a link:

https://www.airliftcompany.com/

(Appreciate the 6 cyl spring advice as my front is now too high like an early '60's Super Stock. I'll give your idea a try---Thanks)

[JJDeville]

I have ran air shocks all my years of driving muscle cars. As long as you just use them for a little boost and don’t jack them to the moon ,you are good. They were factory installed equipment on El Caminos, Monte Carlo SS 454s, SJ Grand Prixs, among others.

[Scott65]

You may want to try a new convertible spring. It could be too high, but could be cut to achieve the desired ride height if so.

[b-man]

Originally Posted by Scott65

You may want to try a new convertible spring. It could be too high, but could be cut to achieve the desired ride height if so.

Cutting the rear springs to adjust ride height is fine if you have a ‘64-‘66 car where the springs have a pigtail at the bottom only.

Unfortunately the ‘67 and later rear springs have a pigtail at both ends of the spring, so you can’t trim the springs.

[gtospieg]

You CAN use 66 springs in a 67...I've had them in my 67 since I built the car.

[RocktimusPryme]

If you want to try a cheap solution Jegs sells a helper spring that is both affordable and a quick install. It raised and leveled the rear of my 64 Galaxie.

Edit: Actually scratch that I just realized those cars dont have rear leafs.

[Scott65]

Contact a reputable company that deals in springs to help you. You'll have to get them the information they need, and it will be somewhat labor intensive, but you can get the ride height you want. You'll need at a minimum to know the weight on the rear, and a good measurement between the spring mounting surfaces at the ride height you want. I dealt with Santhuff some years back for front springs and they were good. The height was a little low and they swapped the springs with no issues for ones that were perfect.

[Bill Hanlon]

How to eliminate rear end sag?

Less beer and more exercise.

[67GTONUT]

Just my opinion.....

But once you mentioned you were going to upgrade to a Moser rear with Disc brakes......... you obviously have some serious plans for the car.

To avoid doing things twice, I would plan where the car is headed...... Cruiser..... Cruiser with Pro-Touring flavor...... Drag...... etc.....
And then look at a complete suspension plan so you can properly pick out parts to get to your final goal.....

[jimib]

Originally Posted by 400 Lemans

https://mcbayperformance.com/passeng...s-trucks-suvs/ These work well and very fast shipping to. Stay away from air shocks. They are to hard on the shock mounts.

Yeah, spacers seem like a possible option, but indymanjoe say they are a no-go. I like the options of a 1/2 inch to 3 inches. Perhaps I could use these in conjunction with air bags.

[jimib]

Originally Posted by indymanjoe

Is the motor in? seriously though my opinion is (1) No air shocks,they will leave ya stranded.( 2) Spacers are a no go which leads to( 3) springs carry the weight and shocks smooth it out. Street section stu.

Yes, the motor is in, a Butler Performance build, steel block but aluminum heads.

[jimib]

Originally Posted by leeklm

Yeah, the front end seems high, but of course the rear is low, so might be an optical illusion. Often times we end up making these cars lighter with aluminum heads, intakes, removing AC, etc. End result is now the front springs are too stiff! That happened on my 73 GTO and ended up installing moog springs listed for a 6cyl car to level it back out

To get the rear up, I have always been a fan of Air Lift airbags. Nice they are fully adjustable so if you are loading up the trunk with coolers, etc, you can increase the lift a little more.

Sent from my SM-G965U using Tapatalk

No illusion, what you see is what it is. I like the Air Lift airbags idea. but I would also like to install a taller springs if possible.

[jimib]

Originally Posted by Scott65

You may want to try a new convertible spring. It could be too high, but could be cut to achieve the desired ride height if so.

So are convertible springs taller? I like this idea.

[jimib]

Originally Posted by gtospieg

You CAN use 66 springs in a 67...I've had them in my 67 since I built the car.

I'm not clear what you mean. The 66 and 67 are about the same car (or so I thought). Are the springs from a 66 a taller spring?

[jimib]

Originally Posted by Scott65

Contact a reputable company that deals in springs to help you. You'll have to get them the information they need, and it will be somewhat labor intensive, but you can get the ride height you want. You'll need at a minimum to know the weight on the rear, and a good measurement between the spring mounting surfaces at the ride height you want. I dealt with Santhuff some years back for front springs and they were good. The height was a little low and they swapped the springs with no issues for ones that were perfect.

Thanks Scott, maybe they will have a fix.

[jimib]

Originally Posted by 67GTONUT

Just my opinion.....

But once you mentioned you were going to upgrade to a Moser rear with Disc brakes......... you obviously have some serious plans for the car.

To avoid doing things twice, I would plan where the car is headed...... Cruiser..... Cruiser with Pro-Touring flavor...... Drag...... etc.....
And then look at a complete suspension plan so you can properly pick out parts to get to your final goal.....

Yes, I have come into some money and can complete my ground up restoration project that has been 5 years now. This car will be a cruiser (no racing). All I need now is a complete rear, 5 speed tranny, bumpers, larger tires and rims,.the interior and car complete.