I use the ATI Damper on my 414 race engine. I am using a CVF Racing single groove crank pulley which bolts to the ATI Damper. The ATI sticks out around 0.150 to 0.250 more than stock so you need to shim the alernator and water pump so the belts align. I am using an electric pump so I only had to deal with an alternator as well.
