HKS cams, in stock head, do i need any other work?

[Boostcreepgsx]

This weekend my car is goin in for a timing belt. While its apart, i was thinking about having my cams installed, but i was woundering if theres anything else i need to do to the head befor i put the cams in. I know on dads old V8 the stock valve springs are good, only to a certin lift. Do we have that problem on out cars? Or can i throw them in with no problems. By the way, they are 272/267 hks cams

 

[pneumo]

You can throw them in with no problems as long as they're installed correctly, of course.