I have a 2002 Gulfstream with twin honda 130s. Instead of a $7000 repair I am considering repowering with Yamaha 150s. Does anyone have an idea of a ballpark price to repower with new gauges? I see prices on the internet of 11k-13k for each engine, but of course that is not installed. Not sure what the total cost should be. Any thoughts would be greatly appreciated.