anyone know about 87 broncos?

So what you're saying is that they didn't have any ventilation on the engine except one cheap push in filter?

Yeah, that would cause an oil leak.
Correct, one bank was vented properly, the other was effectively plugged up

(Funny thing is, I stopped at advanced auto parts to get the PCV valve, and the only grommet I could find was a Mr. Gasket 6376 which has the exact combination in it as was installed on the engine)

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now, if i could just figure out how to get the in dash oil pressure gauge to work, i should be all set