Good Thing about the Camaro. For any car engine and transmission you put
into a boat you will need to work out some form of thrust bearing on the
propshaft. A small block slant 6 or v6 might be the best options. Besure
to put a fire resistor on the carb.

As far as the merc. throw in some mystery oil LOTS OF IT and let it soak
out for a little while then fill with oil. Put plenty of mystery oil in the
cylinders to insure that the rings are free. The old timers used mystery
oil and or BRAKE FLUID for years but i'm not certian how well the main oil
seals would take to the break fluid, they should handle it. But again,
while you have it out it might be a good bet to replace the front and rear
oil seals anyway. Keeps the gunk out of the bilge.