Oil pressure in head
I only know about Chevy stuff, but on a dry sump the regulator is built in,
we have a bolt that controls max pressure, you can't miss it.
Which is the same for any kind of motor.
If you're still using internal stuff, I have no idea.
If you can install a restrictor in the oil passage to the ohc stuff, without reducing the flow to the mains, then you can probably do it this way.
If it's going to restrict the mains, then you'll have to modify the oiling system so the top end and the bottom end are fed separately, or so the bottom is fed first.


