I recently did a gt40p/cobra intake swap on the 93 and everything seems to be working as far as power goes, but I keep getting a oil light after about a tank of gas.(Half a quart low) I have noticed a tapping behind the driverside valve cover but it comes and goes and have not been able to pinpoint it. Also blows smoke from the tail pipes, again it comes and goes and doesnt really happen the same time as the valve/lifter tapping noise. Motor did not do this before the swap so it was something I have done. The Motor was redone in '09 to a 306. The heads were in the machine shop and had the valves redone, also in 2009. However, they sat until just a few months ago. I wonder if the valve seals went bad since they were just sitting in the garage? Any one have any insight on this?