I agree with Big Bird for the most part. It is possible that the installer will refuse to run under System 6. If that is the case, build a System 7 test system and install it there; work out which INITs and CDEVs are installed and use ResEdit to identify where system resources are installed. Then copy the lot of them to your System 6 box.
I supported a few people in the mid 1990s who used these boxes -- I didn't recommend them but the local Apple Centre did. From memory, at the time there were no Open Transport compatible drivers. Check the ReadMe for the latest drivers to see if this is still true.
The first versions of Open Transport were certified by Apple for System 7.1 and possibly earlier. If you are prepared to do a bit of hacking, the later versions may work on pre System 7.5 systems.
I supported a few people in the mid 1990s who used these boxes -- I didn't recommend them but the local Apple Centre did. From memory, at the time there were no Open Transport compatible drivers. Check the ReadMe for the latest drivers to see if this is still true.
The first versions of Open Transport were certified by Apple for System 7.1 and possibly earlier. If you are prepared to do a bit of hacking, the later versions may work on pre System 7.5 systems.