I am looking at a couple of boats...both are 30' and same hull, the one comes with twin 377 scorpions runs high 70's low 80's all day long and is a decent price. What I would like to know is how much more performance could I expect if I supercharged the scorpion engines. Next....I would really rather go with the big blocks but if they performed the same, the fuel savings along with the difference in price would draw me towards the 377's. I would also consider getting the 496 ho's and add the Raylar kits down the road. IS THIS WHAT I SHOULD DO??? Any suggestions would be appreciated.