I put an LS motor in a 72 cutlass that used to have a 455. I also swapped out the springs for 72, 350, non-AC springs. The stance is great, rides nice, but the front just feels like it's going to roll over in turns.
It's got the 15/16ths front sway bar and standard rear bar both on new rubber bushings. I know I could put a 1 1/4" front bar but not sure if that would make much difference.
Anyone swapped out only a front sway bar and can tell me if that alone was noticable?

 

sway bar controls body roll to a degree, an 1 1/4" bar will flatten out the cornering alot, at the expense of some added understeer. I would also increase the rear to a 1"

 

do both front and rear if you are going to upgrade.

As an alternative, try swapping the sway bar bushings and end links on your factory front bar for Polyurethane ones. Ive done this on multiple cars and its a great "dollar per horsepower" improvement. It really tightens up the handling for only a few dollars invested.

 

Looks like it's time to start shopping on ebay.

 

What about just upgrading to poly bushings? Would the larger sway bar make a bigger difference?

 

The bigger bar will make the biggest difference. Harder bushings will affect how soon the bar begins to do its job, and how rocky it makes the ride feel.

- Eric

 

If you add bigger bars front and rear you will be amazed at the difference.