I used to run NGK TR6 plugs which are 1 stage colder than stock, gapped at .035". I'd run my stang at 14* all motor and when I sprayed at drop it 1* off the 14*.
i'd gap the tr6's between .030" to .033" gap and maybe drop the overal timming by another degree if your going to run a 150. Just make sure you have a great tune and adequate fuel supply.