I have an Aluminator in my garage right now. Got it last week. A bad Mofo is all I can say. I don't think you will deal with piston slap. It does still have production tolerences. It comes with ARP rod bolts, windage try, Cobra oil pump, and rear plate and main seal already installed. You will have to get Mach 1 tensioner guide arms and screw in dowels. I did order the 2v one.