Need best method for no leaks at rearmain and oil pan

Any engine needs to have some sort of crankcase ventilation system that DRAWS the gasses out of the engine. A stock type PCV system is more than adequate for most street- street/strip engines. A Race only eningine would require something like the kit shown or something else to create negative crankcase pressure. Most of the guys I see complaining about chronic oil leaks don't have a sufficient PCV system on their cars. Breather caps don't do it! They are designed to allow air INTO the crankcase as the gasses are drawn out by the PCV. Bad gasses out- fresh air in & no oil leaks! Everyone's happy!