btw.. does that kit come with cylinder base gaskets of different thicknesses? If so they must have provided directions on how to determine which one(s) to install. Raising/lowering the cylinder with gaskets adjusts piston/head clearance.
If the problem is lack of clearance, this might be the solution.
A thicker head gasket will also do it but that lowers the compression ratio, which may or may not be desirable.