pistons, heads, both?

in highschool abt 4 years ago i built a 360 for my duster. its a 77 block out of a van. its stock bore, stock dished pistons, stock heads ported with bigger springs (dont remember the spec) the cam is an erson 480 lift 292 duration.
it has an edelbrock victor intake and a holley 650 double pump.

i know the cam is alittle big for my setup. i would like to raise the compression ratio. my question is: should i change pistons and keep my heads? change pistons and heads? or just put a set of edelbrock performer aluminum heads on?

i would like to have a compression ratio of around 10.5

what do you think? kinda new to this, so any info would help.

all in all, what i want to do is increase power. but id like to keep the cam i have.

thanks.