Inboard options 6.0 vs 5.7 vs Diesel

[OSEAD23]

Hi

I am considering refreshing my power on my 23 IB. My carb 5.7 is running Ok but i would like the economy of a MPI or diesel and I'm ready to step it up. some of my questions are:
Has anyone gone with a 6.0 crusader or similar in a 23 IB? i would think the 6.0 with all the extra torque would allow me to turn more pitch and get more speed. My crusader is a 270Hp will i feel a worthwhile difference with a 330Hp MPI 5.7? I have heard guys complain about the performance with new diesels like the yanmar BY any real world experience?

I would like to get a real world cruise in the 25 knot to 27Knot range if possible. today i feel like I'm pushing the 5.7 to hard to run continuous at that speed. Maybe it me babying it but i likes to run at 3k to 3200 rpms and thats about 22knots +/-. I top at 31knots today at 4300 rpm.

Jim