there are modern tools to use - demians blb exporter works in blender 2.79b and there are a couple ports iirc to allow blb importing
https://github.com/DemianWright/io_scene_blbtypically for that exporter its 1 blender unit to 1 stud (and correspondingly 0.4 blender units for 1 plate tall)
if you use an obj 2 blb exporter itll use 1 blender unit = 1 torque unit = 2 studs wide, so halve the numbers i listed above. this is also the scale used for dts exporting
you can join the bcc to get more directed help and you can get quicker help than posting here
https://forum.blockland.us/index.php?topic=318430.0