hi,i can tell you from past experience if your going blown you got to get the wallet out.don't listen to the guys telling you if you only run 5 pounds it will be ok.thats not true,im sure there guys out there that have done it and gotten a lot of hours,but on the whole it just won't last.you could run two to three pounds but whats the point.if you do decide to go with the stock motor a least change your valves, head gaskets and put a gaint oil cooler on it.drive it careful on takeoffs and turns and i think it would last a while.i ran a littlefeild blower running 6 pounds on my stock motor and it didn't last long.three of my freinds ran the pro charger on there stock motors and they didn't last very long also.i can tell you one thing for sure when doing motor work i have been to most in so.cal area,and clay smith built me a motor that just wont quit.alot of other places just pull you motor out and send it somewhere,that is not the way to go.good luck and remember once you get your boat to go faster it will be ok for a while then you will be looking again for more speed so build your motor with that in mind,its a lot cheaper that way.