A broken GRiD 1550SX laptop like the ones used in the movie "Aliens" was converted to a Raspberry Pi and Teensy laptop. Simon did an incredibly clean conversion that includes using the original keyboard plus the IsoPoint roller bar mouse. I assisted by writing the Teensy LC code for the keyboard and IsoPoint. The IsoPoint precedes PS/2 touchpads that eventually became the standard for laptops. The IsoPoint uses rotary incremental encoders which the Teensy converts to USB. The Teensy code can be found on Github.
Very cool project.
An other approach with such a huge shell would have been to mount a mini ITX mobo and put in an i10 multicore to make a real racer, a wolf in a sheeps's clothing. Some flat LiPos and a BMS, a touchscreen and integrated universal AC/DC power supply, PCIe SSD. oh yeah...