i have a newly rebuilt 350 with vortec heads and recently noticed a drop in power...Maybe...Maybe not.i only say that cause i am not sure if it is just me thinking that as i look at the oil pressure guage reading about 10 at idle and around 25 cruising and only about 30 on the hiway. Should it not be between 35 to 50?
Could it be the oil pressure guage?What are all that could cause low pressure?Got any ideas how to test the guage? Or is there any adjustments or calibrations i need to do to it?

Tia,

Lerch