I have an 89 GTA and will be putting on spohn LCAs, panhard bar, torque arm, subframe connectors, steering brace.

I will also be installing a set of B&G sport springs that lower the car 1.3 inches in the front and 1 inch in the rear. Will i need to get all adjustable components from spohn, or will 1 inch be negliable.

 

From everything that I have read so far, you should also get the LCA relocation brackets. When the car gets lowered it makes the rear of the LCA higher than the front and will cause wheel hop under acceleration.

 

I'd definantly get adjustable panhard bar and torque arm to level the rear side to side and correct the pinion angle...

 

Lowering 1” will not make as big a difference as most people make it out to be.

The rear axle location will change much less then you will be able to see and less then it is probably off already, so if you’re fine with where it is now you don’t have to go adjustable there.

Adjustable LCA’s… well, I don’t really know what they’re good for on an f-body. The B-body guys use them to get their rear tires centered in the wheel wells (they are not from the factory), otherwise, I’ve seen a few people suggest using them to “fix” things after they weld LCA brackets on crooked (not exactly even close to the right way to do things). The only _real_ reason that I could think of that they make sense is if you were running especially large tires, you might find that moving the wheels forward or back slightly in the wheel wells may give you some room.

Basically, you won’t have any problems if you use all stock parts on that lowered car, the only thing that I would rather strongly suggest is to get the car aligned after you lower it, but even that doesn’t tend to be that big a deal on these cars (lower a fox mustang and see how much the alignment changes and you’ll see what I mean by that)