The more of your exhaust system that is cooled by the closed side the
bigger heat exchanger you need. Other than that it is entirely up to
you. Any crusader parts will bolt up to your chevy 350. You will need
to do a little customizing but it's just plumbing :-)

wrote:
Greetings,

I'm in the process of replacing the risers on my fresh water cooled
Mercruiser 350's, and remember once again how much I despise the
design of this system.

I've always admired the Crusader system design, because they offer
true fresh water cooling, as both the manifolds and risers can be part
of the fresh water cooling system. Crusader then uses a water
injection elbow after the riser to introduce the raw water to cool the
exhaust, which is easy to service. I also like the Crusader system
because the water injection elbow is away from the engine and
manifold, so if it does seep at some point, it doesn't seep salt water
all over the manifold.

Is there any reason why I could not convert to a Crusader exhaust
system on my Chevy 350's?

Thanks!