Thanks for taking the time to reply.
I'm aware of the height limitations, and struggling to avoid a custom made shower stall, but I think I hav eno choice.
Using the Saniflo Turboflush M300 Round Kit (
http://www.saniflostore.com/Saniflo-Turboflush-M300-Round-Kit-M300-003-005.htm?productId=39)
I can hook up a shower and a sink to the toilet, and have all of the poop and gray water pumped up and out to a drain.
The Italian architect and Italian engineer who built this house in 1937, designed this house to last for a few hundred years! (for example, the kitchen ceiling has beams 6" on center, probably due to the weight of the original cast iron tub). When the old cast iron boiler was cracked open, roughly 40-50 gallons of water flowed out of it and drained into this "drain." However, upon closer inspection the drain was actually a hole in the floor, and a rubber gasket was clearly noticeable, which was blocking the main sewer drain (we opened the gasket and could see lying water in the sewer line). So, where did all of this water go??? The basement supposedly has a sub floor drainage system, based on neighbor accounts who are old enough to recall.
I am hesitant to pound out a hole int he cement, 5-6 inches deep, and ruin this sub drain system. But, with the height restrictions, this might be a chance / risk I have to take.