There's a lot to the merc 555 computer, like knock sensors smartcraft capability etc. all of which I didn't want to give up. I'd call Dustin and chat with him about what you have and what your wanting to accomplish. You won't be able to run more than about 3 psi of boost on 91 oct fuel, with the stock compression ratio unless you change to dished pistons and drop it down.
2006 CLASSIC 18 WHIPPLED MX 6.2, BRAVO 1, STAINLESS MARINE EXHAUST, LATHAM STEERING, IMCO 2" SHORTY, LABBED MIRAGE PLUS
TALK IS CHEAP, I'M FROM THE "SHOW ME STATE" SHOW ME