340 buildups

Daves67Cuda;

I read this thread through. Your getting very good advice here. You'll want to run flat top pistons for several reasons. There cheaper to start. You won't have to make mods to fit the domes into each head chamber, and comp ratio adjustment is handled by head gasket thickness changes.
If it's a zero deck build, the MoPar .020 thick gasket is out. to close. I suggest a .039 Fel-pro or equal.
Keep overboreing down to a min. The thicker the cyl. wall is, the straighter it will stay down the road. This equals power and long life.
Adams cam suggestions are fine. They'll get the job done. But, if you decided on a different one, choose the cam as a total package to the build. It should work in concert with the style of driving rear gears/tire size.
Over camming a engine is duration based problem. Not lift. Though to much lift is a short coming of ethier valve to piston clearance or a head problem. In the valve guided clearance or coil bind.
(Coil bind is a problem with big cams and/or wrong springs. Theres more to it, but I'm not getting into it since the cam you'll use for the target time slip is small. Piston to valve clearance is a near nil problem since the cam is small and modern pistons have great valve reliefs for monster cams.)