Web Cams, what steps to take first Options

[94Toy]

I was wondering what steps should be taken first before swapping out the cams in favor of some web ones. Right now all I have is intake, exhaust, and a centerfoce clutch. This summer I plan on adding a header, most likely custom unless some company gets off their a$$ and gets one done like hotshot performance is claming. Anyway would those mods be enough for a new cam or would I need to do a lot more to the block to get a nice performance gain out of the cams. If I get the cams I plan to get the mild ones so that my idle doesn't go all crazy on me, plus its,of course street driven. So what do you guys think, should I do it or will it be a waste of money?