I ordered a set of BBK underdrive pulleys for my 96 cobra, and not having worked with pulleys before, I don't have a pulley puller. Does anyone know what size I need to get the harmonic balancer off? Also, it looks like cheap pullers on amazon are basically the same price as a rental. I'm sure a rental puller will be better quality, and I don't really think I will need the puller again, but would you suggest getting a cheapo one to have in the tool box or rent one?