Its probably been done, What info do you want?
-Make sure the sump fits around the ke70 cross member.
if it does, drop it in and make the following:
- engine mounts
- gearbox mount
- custom 1 piece tailshaft to an LSD diff.
- Efi fuel system
-Either fit the mazda radiator,. or find one about the same size that fits with the pipes on the right side.
-Find mazda wiring diagram and figure out how to wire it up in ke70.
skids! (after you fit an LSD diff, good brakes and good suspension)
Cheaper and arguable alot better to just buy an mx5 😉