Taking my 2.2 motor and manual trans from 96 legacy any putting in 98 outback with 2.5 auto trans. Is my manual trans the same length as the auto?... What changes do o need to make?

I whould change whole front car wire harness lots of work but if you have whole car for doner this whould be easyest way to go

The cars are the same for engine swap, this I know for sure,, I'm not sure if the manual trans will work without changing drive shaft or tranny mounts

You have to use the manual driveshaft, don't worry about switching the wiring harness, it is not that difficult to redo what is already there to make it work like a factory manual car.

carry over the driveshaft and the rear diff to match the final drive ratio