Oil psi dropping

[Ardent_Z28]

I have a th400 transmission behind my motor and the ears didn't get cut off as far as I could have so those were running into the transmission tunnel when I jacked up the motor... with a 4 L 60 e transmission or even the 6-speed you might be able to lift the motor higher than I was able to ... make sure before you lift it up you take off the oil sending unit from behind the intake manifold because it will crack against your firewall and you will wind up having a massive oil leak if you don't.

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Today I looked for the oil sending unit you referred to @zooguy, but all I found on the back of my intake manifold were block off plates for the EGR valve and EGR valve pipe assembly. It appears the tallest piece on my intake is the fuel pressure regulator. I looked in the GM Service Manual and found the "fuel pump and engine oil pressure indicator switch sensor assembly" above the oil filter. It appears I prolly should remove it before raising the engine. I did find a pic of the "oil pressure sender" in a LT1 rebuild manual that shows it to be at the rear block rail area. The sun was bright today so after I get off work tonight I'll try again with a mirror and flashlight.