340 High Compression Pistons

1Badcolt dont forget to CC those heads,nomather what direction you take you have to measure everything more than once.
I think those chambers will be alitle bigger than they are supposed to be according to catalog,especialy after porting,they are most certainly going to be relieved alitle in the chambers as part of the porting.
Never ever go by the numbers in the catalog measure everything atleast twice to make sure :)