340 Piston to valve clearance w/RHS heads

I was reading something about special cuts of gaskets for the RHS heads.

I'd rather not use hypereutectic cast pistons (stronger than cast but very brittle), just a personal preference. I haven't been able to locate any zero deck forged 340 pistons that are any size other than +0.030. I'm going to be needing +0.040".

Brian told me the heads CC out at 67 most of the time. add the valve reliefs and I'm at about 9.5:1 with a 0.060 gasket.

I'm not going for the ultimate potential of the 340...but I am going with a hydraulic roller cam, good heads, etc to still get a strong build. I'm just willing to trade some top end HP for a flat torque curve (its going in a full interior, 4-speed stick, 3.23 geared car).

We live in the age of the chevy "LS" engine. I'm trying to keep up with these, even with this block that was made in 1970. If I can truly make the numbers DD2000 was giving me and have great streetability and durability, then I will be a very happy fellow.