Get the ZEX 59300 cam. Great improvement over the stock cam. If you are going to keep the stock rev limit of 7200 RPM you can use the stock valve train. If you are going to increase the rev limit you should upgrade the valve train. I've been running mine for over 4 years and I have never had any problem.

FYI...The cam is made by Comp Cams. ZEX just slap their sticker on the box.

 

yup same with their springs and retainers also