1972 318 street build

quick question does anybody know roughly what my CI will be with a 4 inch stroke and .030 over bore, and to add to my original plan im gonna go .030 over and im looking at either 3.79'' stroke or 4.00'' stroke, im sorry if i change my ides to much im just looking for information because im 17 and i understand engines and can build them stock all day long but i have never done any real performance
390.2