Guys, it's a 30K engine. It has, from the description, stock pistons as it's only a 30K engine. Taper should be minimal.

I don't see why you'd do anything to the bottom end. Add ARP bolts, maybe. That means you'd resize the rods. If the bearings look good, reuse'em. Again it's a 30K engine.

In terms of honing and rings, again it's a 30K engine so I'd use a ball hone and moly rings. As moly is just a coating on the face of a cast ring there is no reason why moly rings won't tolerate as much taper as a cast ring. Moly rings are easier on the bore than standard or chrome. The ball hone will follow the bore surface meaning you won't lose the roundness when the heads are on and block is warm. Think about it, the engine has been bolted together and run. During that time the rings wore away areas of the cylinder that were higher than their surroundings. This process is what honing with a deck plate is trying to simulate. You have it already done.

One other thing.....cast pistons need LESS clearance because they have a steel strut cast into the piston that doesn't let it expand so much with heat. Hypereutectics and forged pistons do not have that and grow more with temperature. Hypereutectic aluminum/silicon alloy expands less which is why they need less clearance than forged. Some cast piston tolerances were less than 0.001" on the small allowable end.

R.