hello all i have a 1973 cheetah 16ft v bottom w 455 olds and a berkley jb i'm thinking of going to a zz383 gm crate motor. I believe from the dyno chart of this motor that i should do just fine for my needs.. 60 to 70mph range i know i will have to change a lot but in the long run it should be worth it. this is a small boat and i don't want to get too crazy plus i need all the room i can get interior mods dont matter becuase its all gone. this is a complete resto job thanks for your replies!