I have a stock 78 350 chevy with a 2 barrel carb and I checked the pressure in all of the cylinders today and the #1 cylinder was a 80 psi and the rest were at 120-150. I also have oil pressure just about always between 18-30 psi which is kinda low. My question is do I have a blown head gasket or a worn out cylinder. I'm hoping to just have a blown head gasket which would explain just one bad cylinder but I dont have much experiance with building engines to diagnose on my own. Any thoughts on how to better diagnose the problem.
Joe