McFarlane all the way - I did all three while I was at it this spring and the difference compared to stock is just awesome.

Tip to get the old one off the dash:

Disconnect at carburetor
Pull cable out all the way into the cabin
Countersink drill the bezel in the panel till the nut and sleeve drops off the back. Saves the impossible task of trying to undo the old frozen and rusted nut around back.