AP2POINT2

I have a strange problem with my ap2 motor, apparently this is the highest point in which the cylinders reach the top of cylinder walls. It look's like it can still go up another 5/16's of an inch. I tore my engine down to replace the cylinder rings and a new head gasket due to all cylinders being at 185psi and cylinder 4 being at 85psi. I had a valve job done a year ago and my vehicle had loss of power and misfiring. Valve job fixed the misfire, but low end continued to have little to no power. The mechanic said that the block may have ap1 piston and rods because the cylinder did not reach all the way to the top. I confirmed that the rods and pistons are ap2 because they have "PZX" stampings on them. Maybe the crank is AP1? If you can help, please reply.

AP2POINT2

Sorry I just posted this with my phone. Link to pic is here https://www.s2ki.com/s2000/topic/978...#entry22000055