AST's version of the Six Pack designed to support EMS was called the Six Pack Premium.
Disabling the memory on a Six Pack Plus can be done by setting the jumper to indicate zero memory installed. Removing chips is not necessary. Though if doing that, swap the card with a RAM less I/O plus clock card and send the card on to someone with a RAM limited system.
Does anyone know if you can use 100ns speed chips on the six pak Plus?