joem64 Posted August 28, 2016 Share Posted August 28, 2016 Z persons, I recently grabbed myself an F54 block for my 73. Stock bore is 86 mm, and I want to open to 88 or 89mm. Don't need forged pistons, this a NA, street car, occasional autocross. Doesn't seem like there are too many piston makers out there. Any info would be greatly appreciated. joe in Racine WI Restomod: 73 240z, megasquirt seq FI and COP, coilovers Quote Link to comment Share on other sites More sharing options...
ttodhunter Posted August 31, 2016 Share Posted August 31, 2016 Depending on your head, I'd go with +1mm flattops, you can get them at rockauto for $33/ea with rings. I run them on my P90 head turbo setup with no problems, but had lots of detonation with an N42 head. Quote Link to comment Share on other sites More sharing options...
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