The stock BB spring is around 325 lbs per inch rate, same as a small block only taller.
The 6308 is 380 lbs.
That would be an improvement but might lower the car too much due to the BB weight.
One of the nice things about the 6308 is it is a drop in lowering spring that does not need cutting and is slightly stiffer than stock, which helps handling a little.
You might be able to use this spring with a spacer on a BB Camaro, I don't know.
6320 would be slightly taller than the 6308 and is 380 lbs rate, still would feel pretty much like a stock spring.
Or, pdq67 found #5536 which has one end made wrong for a Camaro and must be cut just a little to fit. It is 488 lbs rate and would be a real nice street spring for a small block with 8" rims and wheels. OR a big block street car like yours.
I have driven SB Camaros with 550 and 700 lb rate springs on the street and a 550 is real nice. So, I wouldn't consider a 500 lb spring too stiff for a street driver unless you are very pickey or your roads are very rough.
All out performance tuner springs for a BB Camaro would be over 750 lbs per inch.
Check my web page for First Gen Camaro suspension info:
David's Motorsports page
First Gen Suspension Page
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Chev 350 Can-Am Vintage Racer
[This message has been edited by davidpozzi (edited 01-22-2002).]