[oldnslow]

The Vortec 350 that's in the truck runs like a *****, great oil pressure, cools good, but it smokes a little at idle when warm. It is a low mile engine removed from a wrecked Suburban, everything looked great when I pulled it apart, leaks down less that 5% on every hole, compression is 160 -165 across. I thought the intake gasket was allowing oil to be sucked in from the valley, so removed the Chinese manifold and added a new Edelbrock RPM air gap and tried again with the same results. I'm guessing that either the valve guides should have been replaced when the valve job was done or the oil rings are stuck / cashed. Guess I will know when I blow it apart, after the new one is installed. I'm using the same Holley 770 cfm Street Avenger carb on the 383.