Do you need to have double keyways on the crank for a blower? Weiand says that their blower are setup for a stock harmonic balancer, so that means only one keyway. Others say you need two keyways. I am putting on a blower in the 8-71 to 14-71. I am thinking 14-71 so I can upgrade at a latter date. I will underdrive it around 20% to achive 10lbs of boost on my 396. What can happen if I only run one keyway? Will it just destroy the keyway? I dont want to take the bottom end apart at this time.
Dan