manifold guage on 5.7 volvo

[cdavisdb]

I am the recent and proud owner of a 25 seafari with a 1998 fuel injected 5.7/duoprop. I am adding some additional gauges, raw water pressure, oil temp, and fuel pressure as a way to warn me of impending problems. My main use of the boat is long trips far away from help, so I need all the warning I can get.

Would it do me any good to add a manifold pressure gauge?, fuel economy? trouble shooting? How would I use it? Any other suggestions for additional guages?

Thanks for your input.

Connor