Starting to pull this motor apart. Got the lifter out from the cam lobe is question. The bottom is pretty galled up compared to other ones. Ran 2 compression tests one "dry" and one with a few squirts of oil in the cylinders. The readings were, 125 went to 155....90 went to 100....135 went to 150....130 went to 135.....135 went to 150....145 went to 150....and 80 went to 90. I don't know what that 80 to 90 is all about. Does this motor need rings? 2 more question here please. How does that round thing (I don't know what to call it) come off the front of the crank. I took the fan belt pully of it but can't see any lock nut or anything holding it on. It's the part that has the timing mark on it. And do I have to drop the pan to get the timing chain cover off. Are the two bottom bolts in through inside the pan like the old chevy 6 engines Thanks, Guys and the car has new brakes now,new shoes, new drums. It really needed new drums.