3.0 /6 in storage the case is filing with oil, and starting to leak on the floor. Options

[Mark Henry]

So my '74 /6 conversion with the DWD sump tank is slowly leaking down into the engine sump. I have a leaking #6 rocker shaft that I'll have to R&R so I know my engine is full to at least to the exhaust rockers. I know it doesn't drain enough to do this if I drive at least weekly. I have a buddy who's well worn engine has hydrolocked a few times due to this.
I had to start and move the car, quite the smoke show.

Only automatic cure I've seen so far is a $300 valve from Rothsport. Or I could just install a ball valve and red tag my dash for just over $20.

I know it's a common 911 issue, do you other /6 owners have this issue and what do you do about it?

[porschetub]

I haven't had this issue but mine is a baby "six",the larger motors have more oil for what is most likely not a much larger crankcase than mine...maybe that's the reason,I run 9 litres and have found that is ok with a stock oil tank but no front cooler.
In my case the oil pressure comes up very quickly on cranking so can only presume the excess (drain back) of oil is being returned to the tank as quickly.
Perhaps a ignition remote shutoff would help so you crank for a while extra and the pump scavenge clears the sump oil before the engine starts if the car has been sitting for a while.