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Allan, When you ordered the pistons did they ask you what cam you were going to use?
The more I look at those pistons I think they just forgot to cut out the valve pockets. The piston dome looks to be about .350" to .450". There would most likely be some valve to piston contact. Also sense your keeping the CIS there seems to be no help from that dome to give the correct CIS flow path.
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Mark Jung
Bend, OR
MFI Werks.com
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