Walter,
Yes, everything was changed out except the dash panel, some gauges and the controls, (needed new set of flo-scans and tachs though) fuel tank, 1-400 gal, remained, as the tank was good and diesel was an option on the boat new so supply and return ports were there. The additional expense was the Northern Lights generator, shafts, props, dripless seals, batteries, racor filter system.
It ended up (if memory serves me) at about 70K in 2003 dollars. BUT it transformed the Luhrs into a completely different boat. One that cruises at 24K instead of 17K and gets .90 GPM with the safety of diesel and increased range.
It always amazed me how much Gasoline could be squeezed so quickly through those small jets in the carburetors of the old big blocks.
Knowing what I know now, I would do it again in a heartbeat. Grover started the work in January and the boat was back in the water in mid March and his work was top notch. By the way there were no $ surprises at the completion either as Grover supplied a complete install price to me before he started and stuck to it. Sounds like a commercial for Grover, but he really did do that good by me.
The Yanmars have 750W tank style block heaters on them that eliminate the need for winterizing (thanks to Freeport Electric). I'm on the water all year (as long as the canal remains liquid) and have found the winter almost more enjoyable than the summer. No idiots just working boats and seals.