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flat top pistons

  1. Is it worth rebuilding an 1986 Mustang 5.0 engine?

    5.0L Talk
    The engine has around 130,000 miles. is it worth rebuild an engine that has flat top pistons? what could i do to this engine to make it gain at least 400 -500 hp?
  2. Help 1988 Mustang 5.0 with Flat top Pistons?

    5.0L Tech
    Hey All, i currently have my engine tore down and am about to install my new GT40Y heads and TFS stage one cam, but for some reason my '88 has flat top pistons. will i run into issues with valve clearance? any ideas? really hoping i dont have to notch my pistons. please help.:headscratch:
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