BBNT is a CPI bin. PCM # 16156930. Calibrations specifically listed for manual trans and 4.3 L35 engine are few:

Model Year 1992 CBJX5723
Model Year 1994 BDCM5424
Model Year 1994 BHRL5909

Several calibrations including BBNT do not list the MY2 5 speed or the "manual transmission" qualification. For these calibrations one would have to open the file and look at the status of the "manual transmission" bit.

This is an old question. One could read posts beginning here: http://www.gearhead-efi.com/Fuel-Inj...ll=1#post11344
Unfortunately the OP did not opt to share the .bin he had been given. If a true 4.3 W manual trans calibration cannot be located, my suggestion is to locate a 4.3 TBI auto and manual trns .bin and studiously work out the changes that should be incorporated for a manual trans.