Inliners International Forums General Discussion Engines HOW CAN I TELL IF I HAVE A 250 CI CHEVY ENGINE ???

Pull the plugs If you see a dish in the piston then it is a 250 As long as it has not been rebuilt with a flat top. The 230 has flat tops / NO dish. The block casting Number can show it as a 230 Or 250 Your # shows beeing Chevy/Olds 64-76 230/250 Block.