Distributor spring change

It came with the spring kit so i already have that. The manual says it is equipped out of the box for a stock type setup. The manual shows me some charts with the different timing curves for the different spring setups. My setup is a 360 duster, ported eddy heads, lunatii voodoo flat tapped cam. 10:5.1 comp, 727 torqueflight, 373 dana 60, street car. 450-500hp. 750 holley double pumper. Fresh motor only 1000 miles on it. 2500 stall converter. I trying to get a little more out of the 0-60mph. I thought maybe putting in the lighter spring for a faster timing advance might help a little. If im wrong there is more options. And if nothing helps i can always put it back to the factory spring setup. All for free. Just want to know if any one has played with this and what kind of results have come from it? Thanks