Cam only
read up and learn about these cars and engines in general. you might learn something, don't be scared..
Searching and reading the stickies would give you all the info you need for now. SEARCH. Typical cam swap replacement of valvesprings, pushrods, and retainers along with the optional timing chain and oil pump would also be required, as would a hands on dyno tune by somebody who knows what they are doing. SEARCH
Oh yeah, SEARCH!!! Seriously, please.

