That cam runs just fine with all stock vortec head parts.
With small cams like that you do not need to get carried away with porting stock vortec heads.
Most of the flow gain from porting is found at higher .450++ valve lift.
You can clean up the ports to good effect but do not attempt to make race ports. its not nessessary and will not help.
That cam works very well with vortec heads on a 350 and 10:1cr, performer rpm intake and 750 holley/edelbrock carb.
375hp 400+ ftlbs torque.