So I have a stock 350 that has a scored piston (45 lbs pressure), so I purchased a new meteor piston from Bailey's, as well as intake manifold upgrade, gaskets, filters, fuel line and piston bearing. I had to sand some scratching of cylinder exhaust side after removing bonded piston aluminum with acid. Then during reassembly I noticed the new and old pistons are different sizes. "45" is stamped on the cylinder and the new meteor piston is 44mm. I went ahead and reassembled it anyway, not knowing the outcome of whether the ring would seal. The saw is testing at 30 lbs pressure now. Is this 44mm piston the sole cause of this, or is it my cylinder, or both? What would be your suggestion on how to proceed?