I made a mistake and used the wrong multiplier for the eqivalent wheel rate above. A 500 lb spring yields a wheel rate of 178 lbs, not 325.
First Gen ratios:
*motion ratio, amount shock moves per inch of ball joint/wheel movement.
.356 MR2** 500 lb spring on firstgen 500 X .356 = 178 lbs/in at wheel
**motion ratio squared, converts spring rate in lbs per inch to wheel rate in lbs per inch.
.6 = MR2
500 lb spring on your car= 500 X .6 = 300 lbs/in at wheel, what you have now.
1.667 is your MR2 Reciprocal ( reverse of MR2). multiply by this to figure what the desired (178) wheel rate will yeild the needed coilover rate. 178 X 1.667 = 296 lbs/in - the needed "new" coilover rate.
Looks like a 300 lb/in spring will equal a 500 lb spring on a "normal" first gen.
So, let's use your now known present wheel rate (300) and use the stock first gen reciprocal (2.809) to figure out what rate spring would have to be used on a first gen suspension to equal your present wheel rate.
Since your present wheel rate is 300 lbs/in, it would equal: 300 X 2.808 = 842 lbs/in!
So it would take an 842 lbs/in front spring on a stock Camaro to equal the wheel rate you have on your car now.
Hope this helps.
Check my web page for First Gen Camaro suspension info:
David's Motorsports page
First Gen Suspension Page
67 RS 327 Origonal owner. 69 Camaro Vintage Racer, 65 Lola T-70 Chev SB Can-Am Vintage Racer