I did that. Just to resize and install new rod bolts cost almost 60 percent of a set of scat rods. Scats you loose the cost of pressing the pistons on, and you get the full monty.
Im going with scat rods.
EDIT: Just to protect the 340 block, and since going with SRP fordged pistons, at the very least I would go with the scats, and honestly would look hard at h beams. Even more so if its a fordged crank. Then the max HP limit would be the block.