Mismatched Cam and Heads?

I've been reading around a lot and it looks like alot of people are using a .509 cam with Eddy heads on a 360. I picked up a cam with 519/524 lift and 250/256 @50. Would I suffer any huge performance loss when using stock port eddy heads? I couldn't really find an RPM range for the heads, cam is advertised at 3,000-7,000. Going with a 3k convertor and 4.10 gears as well.