Hello, I have a 340 that machine shop just bored .40 over. At everyone's recommendations I had stock crank reground . Using stock rods, I have the new trick flow heads and am using a lunati 20200711 roller cam and lifter which has .515/.530" lift. How do I figure out what piston to order ? I want to have around 9.5 to 10 compression so I can use pump gas. I need help figuring out if I get a dish style piston or flat top piston that the valves will not interfere with. Thanks.