OK here are answers to the questions above:
Bondo - I should have said "raw water cooling system".
Achris - I have several diagrams but non mention what to use between the riser and the manifold.
wahlejim - I have used a couple of the old hoses that fit without kinking and used new ones on the...
After having a log style exhaust manifold crack I got a set of center riser manifolds and risers for the 5L (305) chevy in my boat. It is a fresh water cooling system. I hooked the hoses up the same way they were connected on the old manifolds and used the same riser to manifold block off...
