[FL cruiser]

I did manage to make room to get the engine over to the left by putting a 1" thick steel plate between the steering box and the frame.
There is an advantage of moving the engine to the left. Drive shafts and drive line is centered in the original location. Shifters are centered and fan lines up with the fan shroud. Also oil pan is further from hitting the oil pan if the vehicle doesn't have a lift. But I guess it's better to put the engine where it fits best. All other issues can be worked around.
ATX turbo kits could be had with a rear center mounted turbo that was just above the intake at the rear of the engine.
Not sure, but maybe vans had rear center mounted turbos.