Hello Tony,
Now, not trying to continue this off topic discussion, and not knowing your set-up, I will figure the numbers on the aforementioned 250# spring. Do not get offended, I'm just using general numbers, nothing personal. I will assume you meant an 1/8 turn at every corner to try to get close to the 2% number. This is a general calculation in which I will assume a set-up set at 1300lbs with driver, the legal minimum. A 1/8 turn at opposing corners on all four corners (2 up, 2 down), assuming a straight chassis and all other normal variables, should only change the cross weight a maximum of .14%. Obviously this is a general number and has nothing to do with much of anything, just trying to get to your .2%.
Now, back to the topic...
Theres alot of PA guys around, I'm sure someone on here will help you get your car scaled.