The crossover tube is crap. The left side galley should be dry. The only reason for oil there is hydraulic lifters or oil through pushrods and I wouldn't use either of those either. Not with OE style rocker shafts. However, a direct oil auxiliary line putting oil into the front of the right galley is a good idea. This can be plumbed to the passages at the back of the block, the filter adapter or wherever and run under the intake or externally to the front of the block.