Today, I had to reset my timing after removing the distributor yesterday to test of my ignition unit.   While at it I tested my engine intake vacuum which was perfect so no leaks.  Wanted to confirm that before putting in my rebuild brake booster.  I also replaced my oil pressure sending unit after driving it last week.  Pressure seemed low sometimes.   I replaced it because I  thought maybe it was defective (was a new unit).  The replacement is made by Beck Arnley.   I still feel pressure is lo