ok guys i need some help and fast. i have a 355 vortec ('96-'98). the crank and rods are forged i have flat top pistons, stock vortec heads with stock valvetrain, and stock manifold with stock injectors. here are the specs to the cam:
hydraulic roller tappet cam
basic Operating RPM Range: 1,800-5,800 RPM
Intake Duration at 050 inch Lift: 224
Exhaust Duration at 050 inch Lift: 230
Duration at 050 inch Lift: 224 int./230 exh.
Advertised Intake Duration: 276
Advertised Exhaust Duration: 281
Advertised Duration: 276 int./281 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.503 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.510 in.
Valve Lift with Factory Rocker Arm Ratio: 0.503 int./0.510 exh. lift
Lobe Separation (degrees): 112
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Computer Controlled Compatible: No.

my question is do i have change any of my valvetrain? and if so wut do i use with this.

 

You'll need new valve springs.

 

is that all? wut ones do i get, ive seen people with the comp 915 springs, will those springs work?

 

yes the 26915 springs will be needed to allow the use of that cam since its lift is over 0.475". You will need the corresponding spring retainers to fit the Beehive springs.

A PCM tune will be needed as that is a pretty big cam.

peace
Hog