On this motor I knew I was gonna go gen v. Just wasn't sure when. I had gen v lim just no gen v. So I installed the gen v lim and actually made the spacer/adapter and ran a gen 3 on it. Made swapping to genv 8 months later a breeze. That and the fact that I planned on an ssic just hadn't got it yet so I also threw on a nodded rail at engine install. Was able to gen v swap without even pulling the rail lol