Hey budy, don't take this the wrong way but if you ever swap a POS Probe engine into your Elantra GT I am driving down to San Diego, CA to stab you in the eyes with a fork.

:
First off, to make it even happen would cost you way to much money and you would have an older, higher mileage, inferior engine.
Second, Probes were never realy very mod friendly where The Beta engine in the Elantr is.
The Hyundai Rally teams run about 400whp
I would expect the Speed Camp Tib will have well over 700whp when they are done
And to get 200whp out of that moter will be cheaper and easier then trying to swap a Probe moter in.
To sum it up, it is just a bad idea and I would purge it from you mind and never bring it up again or will have to send the Ninjas after you.

: