I may be too tired to do this right but there is some good info some wrong info and some more info to finish this post.
First there IS a MGW short throw shifter for all years of the Viper and in MY opinion it is the ONLY one to get. The MGW knobs are also awesome products that really improve feel and comfort. you can get the entire MGW setup with your choice of knob for
LESS than $400! The shifter was designed with a dual bias spring system that makes the 2-3 shift more precise along with a light spring that helps make it easy to get the thing into reverse with a shortened shifter height (you all know how that can be if you just lowered the knob!). I have sold the first ones and about 40 of them since they were released. No brainier upgrade even on a new Viper in my mind.
You should be able to do the install from under the car as long as you drop the trans member as stated. I do disagree (of course I do right?
) that the trans mount should be changed to a harder one without changing the engine mounts also. Think of this, if the transmission is held tighter than the motor with all it's torque what will happen? What will flex and stress sooner? The weakest link will and that will be the new mount and or the bell housing area of the tranny right? Not good of course.
Do it once and do it right, you will enjoy it much more in the end. Good night!