You only need an impact for the Alternator pulley. Take the alternator off, take it and the new pulley down to an Autozone or a Pep Boys etc. and ask them to change the pulley for you. Most will do it for free, throw the technician a tip for his troubles and you'll be on your way in less than 5 minutes. The other pullies are strictly wrench/rachets.....you will need a puller for the crank pulley but it's an easy install.