I don't think so...need to check. They don't list my exact piston number. I have 285NCP and all they list for my 318 is 285AP. Specs looked the same flat top with 4 valve reliefs. I assumed they just updated some numbers. This motor was built by previous owner in 07. It had a bad cam, so I tore it down to refresh. Didn't need to bore so just a deglaze. Will the pin press in or are pins different? Can the rest be floater and one pressed?