The new pistons are flat top and 4MM DOWN from the bore top. I was told this is the same as a normal full size piston at the bore top with valve cut-outs machined into them. Essentially the flat top of the piston is the same height as the BOTTOM of a valve cut-out so there shouldn't be an issue. This is the argument FOR.

The argument AGAINST is simply agreeing with yourself, saying that the pistons are too high for bigger cam clearance.

Anybody got an answer to this one please...?

Has anyone seen a similar setup before?