milling heads

was looking at a kit from summit with these pistons...But im unsure of stock head cc...just considering this, any help would be great so i don't make a disastrous mistake

Brand: Speed Pro
Product Line: Speed-Pro Hypereutectic Pistons
Part Type: Pistons
Part Number: STL-H405CP
Bore (in): 4.000 in.
Bore (mm): 101.600mm
Piston Style: Flat top, with four valve reliefs
Piston Material: Hypereutectic aluminum
Compression Distance (in): 1.637 in.
Piston Head Volume (cc): +10.00cc
Wrist Pin Style: Press-fit
Pin Diameter (in): 0.984 in.
Piston Ring Thickness: 5/64 in. x 5/64 in. x 3/16 in.
Quantity: Sold individually.
Notes: DurOshield® coated piston skirt.

Piston, Hypereutectic, Flat, 4.000 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring, Chrysler, 360, Each