Originally Posted by Trips

If you not going to be doing anything serous I would just keep it stock.

I would look to check IF the alternator pulley has been also replaced they are normally a set to get the max hp from NST's combo.

If it has? You'll need to change both pulleys, And the belt IF you want to convert back to stock.

The only alternatives are Stillen which only comes with the crank pulley, And the more expensive ATI crank only pulley.