400 stroker

The rods can be on any of the rod journals . but it matters that the rods are turned correctly on the journals . the oil squirt hole on the rod needs to be pointing towards the camshaft side. The rod bearing lock needs to be pointing to the oil pan rail. So you may have to flip the rod on one or all pistons.
The pistons will have to be flipped because the rods can't be. They are pointing the direction they're supposed to be pointing.