found a good deal on what I beileve a few years old cmi's. A dyno tech has them and they were only used to dyno a couple 502's. Heard they have issues though. Thanks for the input.

Do a search on CMI...plenty of info around.

Have seen the Issue in 2 35 fountains with 525s (side by side not stag)boats were new at the time and both had damage to the motors, Merc did not cover the issue and blamed it on the Headers..we ended up fixing the boats and CMI rebuilt the headers under there warranty. this was on 06-07 probably fixed what ever was the issue by now,