Subaru WRX Conversion

Hola~ Everyone! I think I will be getting a 1994 Subaru Impreza WRX but it seems to be auto but I want a Manual.
So I was wandering if it is possible to convert auto to a manual?
If so would it be different to a normal WRX manual?
What is the difference?

And most importantly WRX have an upgrade version of an WRX called WRX STI (subaru technica Internation) and STI have better performance. If I take same parts from STI and put in the WRX would it be the same? Yes or no and WHY?

You could swap out the gearboxes, you'll just need to remap the ECU.
You could put some STI parts in a WRX but it wouldn't be the same as buying an STI outright.

well if you placed EVERY part it would be but that would be damn hard to do and cost a lot more money in the long run. Better off just going aftermarket anyways and get some better parts that fit your needs whether it be autox or drag racing or daily driving.

With the manual you'll have to get the transmission, clutch, flywheel, cables, center console, guage cluster, and will have to put the pedal through the floor which will require cutting.

Also if it's a 5 speed you're swapping in the automatic driveshaft won't work, and probably not the rear diff either. But if you did a 6 speed it would all fit.