It doesn't matter where the locating dimple is, just get all eight with the valve reliefs in the right spot. The pin offset will be correct for each side, just the dimple will facing backwards on four of them. The pistons don't know which way they are facing, and since the wrist pins will be on the same side of center, it will work just fine.
Think of this way, if the wrist pin was offset 1" from center (towards the valve reliefs), the rod would always be 1" closer to the outer wall of the block, as long as the valve reliefs were all on the exhaust side. The indicating dimple makes no differene.
We used to run our Pontiacs with all eight pistons facing backwards, this made them stay at TDC longer due to the off center of the wrist pin. Don't know if ever really helped, but the Chrysler guys were doing it, so we did.
Joe
