Which replacement coil springs?

[krazy86t]

my goals are modest - not trying to autocross or drift the TR - i want stock ride height with a bit more stiffness. mostly street driven car that sees the track occasionally (maybe 12's).

I'm going to rebuild the suspension with the Energy Suspension body and bushing kit + Bilsteins.

There are several coil spring options for the front:
Moog 5598, 5600, 5606 and i've heard people on this board mention 5666 (where do you get those?).
Kirbans has some for the front but no manufacturer listed (perhaps 6566 = Moog 5666?)
Another option Jays GN for both front and rear but no specifics mentioned

Rear springs
Kirbans variable rate

Moog 5379 or variable rate CC627

Would appreciate some guidance on figuring out the differences on these part numbers and what people are running.

 

[jasjamz]

I have heard Autozone springs work out well and are not a lot of money.

 

[williamsGN]

summit racing has Moog, I got mine from rockauto.com but don't see them listed anymore. I went with stock height replacements 4 years ago, either the 5600 or the 5606, they really improved handling/cornering on the car even with only having 60k on the car.

 

[usetaboost]

PM turbonut85, he has brand new kirban springs he just took out of his 85 GN. He pulled them out for moog drop springs.