"I am sure that you guys are getting to know me well by now. I finally got my 350 engine running. It runs on a reverse rotation and i must say that it runs rather well. Now i have the Dilemma of desiding which way to set up my cooling system. I have been reading online that a closed fresh water cooling system is better because if you are running in salt water the engine will last longer. But i have also been aproached with the question, what do i do if the boat starts over heating. I have been told that an open raw water cooling system will give me better results and i have been told that lubricants can be run through the engine that will help slow down the erosion process when running my boat in salt water. The only down fall i see is making sure that i have the proper anti siphoning device set up in line with the raw water system so my engine does not get flooded out and my boat doesn't sink. So i guess what i am asking is, What kind of system would you guys run in your boat if you wanted it to last? Would a raw water system be ok if i decided to port my boat in salt water or should i run a fresh water closed system? Look forward to hereing from you guys and want you to know that i really appreciated all your help believe me. I hope that you guys also continue to follow my progress because this truly is a refurbish job from start to finish and i am sure that lots of other people can learn from my experiance through your site.