How difficult is it to replace the whole dash? (radio hack)

[m6z]

What would be easier? Change out the entire dash or just replace the cut out section? I know the dash is bolted in, but isn't it also welded along the windshield? Just thinking about it. I should prob. quit thinking about it and get back to work, but all I can think about is lunch and this dash question... Truck in question is currently in driver status and I want to make the downtime/disassembley as little as possible.