I need to diagnose if oil burning is coming from valve guides or getting sucked from intake.
Plugs are Oily black and engine smokes when started.
Ran great on stand but having issues in car......

Recently, Leak Down was good on suspect cylinder.
Small drip of oil seen between head gasket and block...
No pressure/bubbles in Coolant.

I took some running EGT with infra red Thermometer and had a big swing on middle cylinders up 100 degrees.

Temperature will increase sitting in traffic then lose power......

Low mile Build-
383/496 with 516 fresh worked heads.


Thanks in advance......