Problems with running Greddy valve springs with HKS cams??

[bleach8484]

I plan on running HKS step 2 264 deg. cams when i finish building my motor.

And the greddy valve springs are not only cheaper, but i believe they have a stiffer spring rate. Signal Auto is running Greddy springs with HKS cams in their Fairlady, but i was just wondering if this would be ok.

I could see where HKS engineers there springs to match their cams. But the spring rate is much higher at all from stock.

thanks, Brandon