Help with front sway bar selection for First-Gen Firebird. . .

[atomicjoe23]

I need some help selecting a sway bar for my '67 Firebird. . .it's got a Pontiac 400 backed by a TH400; I'm running 722 lb coil springs with Koni shocks and a Kore3 GMSS C5/C6 325mm Big Brake kit in the front. I plan on using the car for Auto-X/Road Racing. . .right now I haven't ironed out the rear end; I will be running multi-leafs (I don't know the rate yet) with Koni shocks until I can step-up to a 3-link with Watt's linkage. I selected the 722 lb coils after reading the Pozziracing.com website several times; the car has been sitting for ~13 years while I was in the military and I'm getting it all revamped and ready to go now.

The SpeedTech Performance 1 1/8" tubular bar has a 523 lb/in rate; the DSE 1 1/8" tubular bar has a rate of 1532 lb/in, and there are two Hellwig 1 1/8" tubular bars. . .one is 945 lb/in and the other is 1163 lb/in. . .all of the bars have a 20% decrease in rate once installed.T

Thanks for the help!