You might want to start your own topic about this...
When the intake went...did you replace the lower intake manifold gaskets? If not, you're probably continually running coolant into the oil...hows your coolant level? what does your oil look like?
also, to the person that had HIGH oil pressure, why would you want to lower this down? high pressure isn't bad, high pressure is GOOD. they sell kits at intense to make your pressure HIGHER in a higher performance, modded 3800...but still, high is not bad. unless its pegged, and then you've just got a bad sender.