Guidance on parts to upgrade the suspension on 1995 Firebird Formula convertible

I have a 1995 Firebird Formula convertible with ~ 43,000 miles.

My goals are to improve the car's handling and reduce the 'shaking' when driving over rough surfaces. It is highly unlikely that the car will see any drag or autocross track time; however, I would like to move the driving experience as "close to the Germans" as possible in terms of handling and ride quality.

Currently the I have installed SLP's sub frame connectors and a 21mm rear sway bar.

My current plan is to install (1) the P-S-T "Polygraphite" Front end kit, (2) replace the springs with performance units with a 1 inch drop (, (3) install performance shocks (Bilstein quality?); and (4) replace the front sway bar with a 32mm unit.

My questions:

Given my goals please advise the following:
What benefit would there be to changing the stock front A-arms to tubular units such as those from BMR or Global West?
What benefit would there be to installing a 35 mm front sway bar instead of the 32mm? And what is the downside - poor ride quality?
How will the foot pound rating of the replacement springs affect my goals (i.e., BMR's are rated 310-550 lb/in; rear 145-170 lb/in versus Hotchkis are rated 285-525 lb/in; rear 100-140 lb/in)
What benefit would there be from replacing the rear lower control arms and panhard rod with performance units such as a CATAPULT Rear Suspension Kit
Is an adjustable panhard rod needed for a 1 inch drop?


I live in Wayne NJ - can you recommend a good shop or dealer to perform this installation?

 

1) Not much, other then added adjustability to your alignment and lighter weight.
2)The 35mm swaybar will match the rear 21mm much better and greatly improve body roll.
3)Higher rating usually means a stiffer spring. But make sure you aren't comparing LT1 springs with LS1 springs. They are rated differently.
4)If you plan on lowering your car 1", you will need LCA relocation brackets to reset the position of the rear control arms. Tubular arms will help transfer the energy given during a launch to the rear axle to help plant that power to the ground. You will need an adjustable panhard rod to center the rear axle under the car after lowering it.

Also, you might want to look into the SLP revalved Bilstein shocks and their custom tuned Eibach springs. The SLP shocks and springs where created to work with each other.