I talked to the seller and he said he would refund if the kit does not fit (I have KM147).
There is also a replacement pan the stiffens the whole transmission for sale on here.
Similar transmissions have been used in Mazda and Fords just without the cable shifters I was looking at the 5th gear in a few RX7 that would give a 0.7 overdrive instead of the 0.8 currently in the box. Big improvement. I just want a practice transmission since mine is being used currently

Standards are typically easy to rebuild (few are tough, it depends on the design and need for specialized tools).
Cheers