I do understand the want to since there is sooooo much involved in dash R&R. I wouldn't try it though. If it goes bad and the dash has to come out after all, a lot of time, paper, and tape, was wasted.
In my opinion and experience, That time is better spent replacing the 2 under cowl seals, servicing wiper pivots and linkage, etc.., etc.., while the dash is out.