Why risk it? How much would you save "attempting to fix it" over just buying a blank dash? You have the old dash to locate the guages, you have the option of putting the guages where you want them (ie, where you can easily see them at a glance - let's face it, with these cars 99.9% of your attention needs to be on the road, the guages are not the easiest to read, the seat and wheel have little to no adjustabiltiy, so you want to mount your seat and use paper templates to make sure your guages are clearly visible, that switches are easily reached (which belted in), etc. I recommend everyone starts with a blank dash...very little extra work, but I believe the results are worth it.
Planning a mid-life Cobra, not a mid-life crisis