Who has a 20 I/O?

[Shadetree]

JW- this engine/drive setup we have here is a hodgepodge of parts from different years, thats why I'm having so much trouble figuring out what I should expect out of it. It has a relatively new Alpha Gen II drive on it, but an older transom assy.(the shift arm in the bellhousing has been modified to work with the gen II). All the 120/140/3.0 should have either 2/1 or 1.98/1 gears, but I didn't check when the drive was off the boat. The drive will be getting new U joints soon, so I'll check the gears then. Given the fact that I think the engine is real high time, I wanna keep cruise at or below 3000 rpm for longevity, and would like to get 22-23 mph out of the boat at that rpm. Let me know what you find out on yer prop, if ya remember.
Thanks,
Pat