I checked the compression and have 145-150 for 7 cylinders and 135 for one. I also pulled the valve covers off and turned the engine manually to make sure all the valves were opening and closing but who knows what the valves look like in there. I am pulling the front end apart this weekend to check the timing chain and then reset the timing to see if that helps. If not I will pull the engine and just start at the top and work my way through it. When I changed the plugs you could tell the engine hadn't been taken care of in a while either. I've been doing some price checking and if its anything major i think it is 360 time for old blue.