305 vs 350

[wattaway2]

Just a lil add on to my comment on the displacement issue -most small block chevy motors use the same bell housing pattern as well as the engine block mounts it's one of the things that makes them so popular I would check into just how much horse power the outdrive you are using will handle. I would think you would be fine but it's something to look at first I've seen a lot of the 383 sm block chevy advertised and can tell you from drag racing they are a great combination with great torque and hp that didn't seam to hurt itself with terrible crank shaft rod angles and such the 350 was also a great size