I've pulled the console apart to see about doing it from the top & you'd have to get at the 3 bolts blocked off by the trans tunnel, I guess drilling thru it from what I've found searching. I've done shifter swaps on many of my mustangs, my 2000 RT/10, & my CTS V, all from the top, the Viper gen3 seems way more difficult than those. The gen3 & gen4 should be very similar in terms of installing, I don't belive the console & tunnel are very different but I've only pulled the gen3 console apart.
I have an SVS shifter sitting here & struggling with how I want to approach the install ...