I'm using these pistons. There's a hair's worth of valve relief on the intake side, and absolutely none on the exhaust side. I still don't have the cam with me since Crower isn't done with the regrind. However, the regrind is going to be very radical, with the Max Lobe lift being around 0.32x - 0.33x, and duration around 245 degrees at 0.05" lift. I'm not sure but I have a nagging feeling that I'm going to need some big valve reliefs with these pistons, since the measurements give me a piston to deck height of 0.006" out. Nowhere near the first ring but the piston will still peek out of the bore. Will be using either a standard Y8 gasket (0.027" thick or a revised A6 at 0.048" as per Matt). What is the best way to give some clearance? Where I live, the machine work isn't really anything special, and neither is the general aptitude of the machinists. So it has to be simple. I'm thinking of the Endyn rollerwave style reliefs but I'd like to hear some smarter opinions from you guys. Thanks!