Hi guys. Hope you all doing fine.
I have since 2 years Tein Speed Z coils under my GS450h and I love them. The car is relative low and looks great (to me). But I have camber in the fornt as well in the rear. For the front I installed the USRS from RR Racing since this will help reducing the tire wear when braking. I am planning to buy the Adjustable front upper arms to fix this.

For the rear I wanted to install GodSpeed adjustable rear upper arms that I already bought but I found out the following:
A) I doubth that ONLY this adjustable upper arm will help with the camber since the rear axle has also the Rear upper arm, the Toe lateral arm, and the toe arm with balljoin.
B) the actual arms attached to the rear axle are strongly "welded" bij oxidation and if I try to get the bolt out I will brake the rubber of the connection rod and I will need to buy new axles. €€€€€€€

Based on this I have 2 questions:
1) Do I need to buy the Rear upper arms, Toe lateral arms and Toe arm with balljoin and install them together with the adjustable upper arms I already bought? Look at the picture the parts I described with #1 to #4 please.
2) Are there aftermarket poly bushes that can replace the rubber joins inside the rear axle? Check picture 2 with in Yellow the rubber join.

Thanks a lot guys.

Cheers.