Absolutely not. It will be a short-er shifter.
I'm not gonna really try to explain in detail...but a true shortshifter changes the physics of the throw by varying the length of the shifter and changing the pivot point.
I just installed TWM a couple weeks ago.
Pics here https://www.celicahobby.com/ubbthre...ew=collapsed&sb=5&o=&fpart=1
Notice the to shifter rods when the balls are side by side
...you'll notice that the top end is shorter but the bottom end is actually a little longer.
anyways point is...don't do the ghetto job and cut the shifter...if you're gonna do that you might as well cut your springs to lower your car...know what i mean?
grab a TWM or B&M or TRD
shortshifter (shortest to longest)