MBHD,
From one of your earlier posts above, you didn't say that a non-lockup converter will provide better gas mileage than a lock-up converter, did you?
Assuming that you do the tricks to lock-up the converter on higher gear(s) and speeds, that “direct-drive” will offer much better efficiency then the “fluid coupling”.
Just to share a market trend on bigger rigs, newer Allison – automatic/electronic - transmissions used by transit busses, trucks and RV’s are able to lock the converter in all (six) gears, unlocking it for a fraction of a second during gear changes.
