That depends on what compression ratio you are trying to achieve with what displacment you are planning to run.
A nice small chamber combined with a reverse dome piston goes a good way toward efficency and detonation resistance.
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2002 5M GT (99% stock)
1991 5M LX (30% stock)
patiently awaiting my satin silver 07 Mach 1, and don't forget the shaker
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