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Pontrc,

I sure will. I will be renting a spring compressor and any other safety tools I need from Advance auto to do the job safely.

When I had my 1976 Gran Prix back in the 80's I did the rear Spings in the parking lot of the apartment I was living in at the time. I know totally different animal then the fronts. I never did attempt to do the fronts.
I cannot find that there is a current AC part number for a front spring for your 69 GTO. Maybe's there's one out there, but it's beyond me. The ones I suggested should do the trick, or if you're ordering from a spring maker, they'll just make what you need.
There's not a ton of equipment you'll need. The rears are super easy. The fronts are a pain. You do not compress the springs, you move the lower control arm. There's 2 main methods; Separate the lower ball joint and open it from that angle or remove the control arm bolts and go from that side. Either way that control arm is LOADED when you do this so be careful.
 

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Dp when I did mine 10 yrs ago and this was doing all the suspension I did the lower ball joint route. Of course the ball joint was new anyway.I did not have the front end or engine to help with the ballast and when trying to compress the car was lifting off the floor. Had to put the engine in temporary to get it done. Don’t think a spring compressor is going to work on install so much of that spring is housed in the upper chassis. The other method Mine spoke of I would probably do on a rack not jack stands.Probably would replace lower ball joints too use Moog parts
 

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Dp when I did mine 10 yrs ago and this was doing all the suspension I did the lower ball joint route. Of course the ball joint was new anyway.I did not have the front end or engine to help with the ballast and when trying to compress the car was lifting off the floor. Had to put the engine in temporary to get it done. Don’t think a spring compressor is going to work on install so much of that spring is housed in the upper chassis. The other method Mine spoke of I would probably do on a rack not jack stands.Probably would replace lower ball joints too use Moog parts
Yes, you will not enjoy trying to do the control arm bolt method on stands! If you're on a hoist, then that is by far easier than the ball joint method. I mentioned it as in my shop we installed about a zillion sets prying them in from the ball joint side. I hired a new old tech about 20 years ago and he brought that method to us. Hoping someone else might pick up a tip.
 
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