Info on Mini Power-Rack?

well,i train alone in a small room(3x3sm) of my ware-house,one of my surfcasters friends gave me a beautiful adjustable bench bodymaster type,i need some specs to give to my hammersmith to make me a power-rack,not the standard but something that allows me to make MP,safe-chest bars,inclined bench etc.
room doors are very tight.

until now I used my flatbench with safe-chest bars attached so i used it to rack the bb when rowing,shruging,dead (concentric) bench,pin deads etc etc

OP, this might get a better response in the powerlifting section. I have recently started training at home(fuck u premier fitness) again and am interested in any help you recieve as well. Low ceilings blow.