Can I put roller rockers in my 1993 Camaro Z28 stock and increase lift and with the increase lift, I am asumming more power with out changing heads, cam, and the bottom end. And if I increas lift, would there be sufficient room between the Piston and Valves? And if anyone has done this What kind of power gain can I expect with different rocker ratios?

Any parts suggestions would help from low cost to the best?

 

You can upgrade to 1.6 roller rockers without a problem and won't have any P-V issues. Definitely upgrade the valve springs though to at least the LT4 set which runs around 35-40 dollars. You may see gains of around 10hp.