I'm picking up a crx with a jdm b16a in it. i was told the heads built. also the guy said it put down 283 hp..i was wondering if this is possible with a shaved port and polished head, 5 angle valve job, skunk 2 retainers and springs, stage 2 turbo cams, skunk 2 manifold, b16a3 rods and pistons and crank..also he said it's safe to rev to 11grand...thanks