I recently purchased a used 98-02 diff assembly from Hawks and I thought I would replace the LCAs and torque arm.
My question is concerning Spohn vs UMI, tubular vs square, adjustable vs fixed, and mild steel vs chrome moly. I have no ambitions of performing 3000 rpm clutch dumps with slicks or any other form of extreme driveline abuse. It's a fun street car, but it does have a procharged 355 with 700r4, so there is a need for strength.
I was thinking of going with mild steel, fixed, tubular LCAs and a mild steel adjustable panhard bar, and a mild steel adjustable torque arm mounted to the trans crossmember.

Any suggestions/thoughts?

Thanks,
Jamie

 

I would make sure to go poly instead of rod end for a street car just for sound issues. Rod ends are loud. I have UMI on 2 cars and Founders on another and can tell no difference, so I would definitely consider them especially for the price savings. Adjustable is never a bad idea on LCAs though is not usually needed, but I think it is a must on a panhard bar.

 

The Founders 3 way poly joints for street are excellent! Have a set myself
I'd get their panhard bar too...

As for torque arms... I've had a few and all seem to make noise...
A worthwhile investment was the poly bushing for the stock arm...
No noise, noticeable difference... once you switch the arm from stock, it's a bit louder..
At least from my experience...

Rafael

 

Oh, and weld in sub frame connectors are nice too

 

LCARBs

 

You didn't buy another ten bolt did you? If so your money needs to go into a better differential. Forget suspension till then unless you're going to baby the car.
Otherwise:
Subframe connectors
Lower control arm relocation brackets (LCARBs)
Bushings or replacing the whole arm assembly(s)
Torque arm mounted on the tranny crossmember

 

Putting the Torque arm to the transmission crossmember is a stronger place to mount, however it is louder as well. If you get the adjustable torque arm that attaches to the Transmission with a Poly bushing it is quieter. I know because I have had both and the solid mount makes a good bit of noise! I think everyone else covered everything quite well.