Need tips and advice for A8 Tieferl. + front axle

Hey, guys.

as a newcomer to this forum I would like to say a big praise to you and at the same time torment you with a few questions
The following vehicle are in my possession in September: Audi A8 3.7 Quattro Bj.1997 and very satisfied with it in all.

Since it should stay in my possession longer because there is no better car for the money, I wanted to refresh the chassis a little (crossbar exchange+div. etc.etc.) and what to do for the optics (depth).
That the A8 has to struggle with front axle problems is not to be denied, I myself am not as extremely affected as many others what you leave here but also I hear a poltern and clacking from the front axle here and there. As you can read out in some cases, it is advisable to renew all steering and suspension parts (crossbar kit) as step by step.So it should be an entire crossbar kit which includes the following: All crossbars for front axle, both trackbar heads and the two coupling bars + complete screw set. The whole set has the part number G8-532KK. Unfortunately, I don't know what it looks like with the quality of the sentence, anyway this sentence is cheap to get.But if you leave that the VAG itself original. Also, do not divide the yellow of the egg, it makes me feel a little positive again. Much more important for me is to know if there is any need to exchange/should be at the VA. what this kit doesn't include?

Now for lowering, only the VA would like to. lower and I hit the KAW springs (60mmVA). Can also be installed with the serial dampers. I think that my car is a little bit deeper than some other A8.How can I find out what kind of Audi chassis is installed in my car?
Should I still have only a standard suspension, what does it look like with 60mm deeper laying.Is this still to be represented with the normal dampers?

For your answers, I thank you already, who can certainly save a not so experienced from much stupid stuff and expensively misinvested money.

Best regards
Tonio N.