Here's most of what you need for a 5-speed swap. You get everything pictured for $500 obo. The bellhousing needs fasteners to hold the trans/adapter plate together. Also a little notch for the bottom bolt on input shaft seal. I can put it together for a serious buyer
That adapter doesnt look thick enough to work with a normal R154 input shaft length (should be +30mm?) sure that box isn't a R151 or something? Either that or is it an odd model of gearbox with short input shaft?
I have an R154 for sale in the UK if anybody is interested. I bought it for my '77 RA 28 Celica but I have elected to use one of my W58 transmissions instead because they ard smaller and fit the transmission tunnel better.