360 stroker

I have a 1972 360 block bored .030 I have a Scat crank with 4" stroke I called Summitt and ordered pistons KB 356.030KTM after attaching to Eagle 6.123 rods they come out of hole .120 . I am using Edelbrock RPM aluminum heads and this combo won't work. I don't know are these wrong pistons ? does everybody have this issue to stroke a 360. I am about to buy a stock 360 crank. I would liked to have stroked one but is my best option to go with stock 3.58 crank ? Can I buy pistons that will work with out milling new heads ?