You won't make anywhere near high 300's.

Maybe low 300's on E85 with the S2X...and it isn't a popular cam...and doesn't make very decent power gains...S1X or XP...or run a VS and high ratio rockers...or step it up to the IS3/TEP/Custom Cam.

Stock chain/dampner is fine...as long as you don't dump the idle to shake China like I did.