360 build

i have a 78 dodge 360 i recently got some reworked heads for it a crane energizer cam with 272 (thats wat it says on the barcode tag) its a mild cam i was told and i plan on getting a four barrel intake and carb wat kind horse power numbers aam i gonna be looking at? any estimate will help i do plan on running headers and a full 3 inch exhaust with 3 inch cherry bomb extremes