no oil on rocker's drivers side only? 360 magnum

If the balancer is just round with no offset weights on it and the converter and/or flex plate have no weights on them then it's possible it was internally balanced but I doubt it.

By the way that rod bearing is curled and no longer fits the cap indicates it's been pretty hot. I would either measure that crank carefully or send it out and have it checked thourghly.