Watch out for zero deck pistons and the head you have.
There speced out to be 9.8-1 with open chambered heads and a .039 gasket. Thats a tight quench area. To much gasket and you'll lose the bennifit of the quenched area.
KB107 pisotns have the highest compression height of off the shelf pistons. These will wind up approximatley 0.015" in the hole on a typical non-decked block. With a typical 70cc open chamber head and a typical Fel-Pro 4.150 x 0.039" head gasket you will get 9.6:1 compression. With this type of piston and an open chamber head you do not get any quench. You would need to get a step/dish piston to provide a quench with open chamber heads.
It would likely be cheaper to change pistons than to deck the block 0.080" and machine the intake to match.
BTW, if your pistons are 0.080" in the hole your compression is more like 7.5:1